This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, books slid off when Maya carried them to the rug, so Maya and Chen built a tray with raised edges to keep them in place. They built the model using a shallow box, cardboard strips, and tape and shaped it to have raised edges on all four sides. When they tested it, they put books on the tray and walked, and the books stayed on without sliding off. Choice B is correct because it accurately identifies the shape feature of raised edges and correctly connects to the observed function of keeping books from falling off, including evidence from the demonstration where the edges acted like walls during walking. For example, the raised edges formed barriers and when books were carried on the tray around the classroom the edges prevented them from sliding off. Choice A represents wrong function attributed. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, water spilled when Carlos poured into a small bottle, so Carlos and Keisha built a funnel with a wide top narrowing to a point to guide the water. They built the model using paper, tape, a bottle, and a cup of water and shaped it to have a cone with wide top and narrow bottom. When they tested it, they poured water into the wide top over the bottle and it went in with less spilling. Choice A is correct because it accurately identifies the shape feature of wide top and narrow bottom and correctly connects to the observed function of guiding water into the bottle, including evidence from the demonstration where water flowed without much spill. For example, the wide top narrowing to point directed the water and when poured, it entered the bottle as shown in testing. Choice B represents aesthetic reasoning. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, markers kept rolling off the table, so Jamal and Sofia built a holder with round openings to keep them in place. They built the model using cardboard, tape, scissors, and markers and shaped it to have three round openings in a flat cardboard strip. When they tested it, they put each marker into a round opening and tilted the holder a little, but the markers stayed in place. Choice A is correct because it accurately identifies the shape feature of round openings and correctly connects to the observed function of holding markers so they do not roll away, including evidence from the demonstration where the openings held the round markers during tilting. For example, the round openings matched the markers' shape and when tilted the holder, the markers did not roll away as shown in testing. Choice B represents a material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, paper clips slid off when Keisha carried them, so Keisha and Yuki built a tray with raised edges to keep them from sliding. They built the model using cardboard, tape, and a small cup of paper clips and shaped it to have folded up sides making raised edges. When they tested it, they put paper clips on the tray, walked to the teacher, and the clips stayed inside without falling. Choice A is correct because it accurately identifies the shape feature of raised edges and correctly connects to the observed function of keeping paper clips from sliding off, including evidence from the demonstration where edges contained items during walking. For example, the raised edges formed barriers and when items were placed on the tray and carried around the classroom the edges prevented them from sliding off. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, pencils and erasers got mixed up in one bin, so Emma and Amir built a box with cardboard dividers to keep them separated. They built the model using a shoebox, cardboard strips, and tape and shaped it to have dividers creating three sections. When they tested it, they placed pencils in one section and erasers in another, shook the box gently, and the items stayed separated. Choice A is correct because it accurately identifies the shape feature of dividers and correctly connects to the observed function of making sections that keep items separated, including evidence from the demonstration where items did not mix during shaking. For example, the dividers created separate compartments and when supplies were placed in different sections they stayed separated during the test. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, Yuki could not reach the paper towels on a high shelf, so Yuki and Marcus built a platform with a flat raised top to stand higher. They built the model using blocks, small boxes, cardboard, and tape and shaped it to have a flat top raised about 6 inches. When they tested it, they stood on the flat top near the shelf and Yuki could reach the paper towels. Choice A is correct because it accurately identifies the shape feature of the flat raised top and correctly connects to the observed function of letting Yuki stand higher to reach, including evidence from the demonstration where the surface provided stable support. For example, the flat top surface provided a stable platform and when student stood on it they could reach items that were too high before. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, crayons and glue sticks got mixed in one bin, so Chen and Emma built a box with dividers to make separate sections. They built the model using a cereal box, cardboard strips, and tape and shaped it to have four compartments with dividers. When they tested it, they put crayons in one compartment and glue sticks in another, moved the box, and items stayed separated. Choice A is correct because it accurately identifies the shape feature of dividers and correctly connects to the observed function of making separate sections so items do not mix, including evidence from the demonstration where items stayed in compartments during movement. For example, the dividers created separate compartments and when supplies were placed in different sections they stayed separated during the test. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, Amir could not reach the class calendar high up, so Amir and Maya built a platform with a flat raised surface to stand higher. They built the model using two sturdy boxes, cardboard, and tape and shaped it to have a flat top surface to stand on. When they tested it, they stood on the flat top and Amir could touch the calendar. Choice A is correct because it accurately identifies the shape feature of flat raised surface and correctly connects to the observed function of letting you stand higher to reach, including evidence from the demonstration where the surface allowed reaching higher items. For example, the flat raised surface provided a stable platform and when student stood on it they could reach items that were too high before. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, round balls rolled away during clean-up, so Marcus and Jamal built a barrier with U-shaped walls to block them. They built the model using blocks, tape, and small balls and shaped it to have a U-shaped wall with three sides. When they tested it, they put balls inside the U-shape, tilted the table, and the balls stayed behind the walls. Choice A is correct because it accurately identifies the shape feature of U-shaped walls and correctly connects to the observed function of blocking balls so they stay put, including evidence from the demonstration where walls stopped rolling during tilting. For example, the U-shaped walls formed barriers and when balls were placed inside and table tilted the balls didn't roll out. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, small toys were hard to store on one table, so Sofia and Amir built a shelf with horizontal levels to create more storage spaces. They built the model using small boxes, cardboard, and tape and shaped it to have two horizontal levels like shelves. When they tested it, they put toys on the top and bottom levels, and more toys fit in the same space. Choice A is correct because it accurately identifies the shape feature of horizontal shelves and correctly connects to the observed function of making more spaces to store toys, including evidence from the demonstration where extra places held more items. For example, the horizontal shelves created additional flat surfaces and when toys were placed on levels they fit more than before in testing. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.