We need the root word here. The root is the simplest form. 'Rain' is the root before adding endings.

We need the root word. Clean is the simplest form. Cleaned has -ed and cleaning has -ing added to clean.

We're finding the root word. Wash is the root word. Washed and washing have endings added to wash.

We're looking for the root word. Root words have no endings. 'Clean' is the root without -ed or -ing.

We're finding the root word. Help is the root word. All the other words have endings added to help.

This question aligns with CCSS.L.1.4.c, which focuses on identifying frequently occurring root words and their inflectional forms. A root word (or base word) is the main word before any endings are added, and inflectional forms are versions of the same word with endings like -s, -ed, or -ing added; for example, 'look' is the root word, and 'looks,' 'looked,' and 'looking' are its inflectional forms—they're all forms of the same word 'look' with different endings. In this stimulus, the word family includes walk, walks, walked, and walking, where 'walk' is the root word, and the inflections are 'walks' (with -s), 'walked' (with -ed), and 'walking' (with -ing). The correct answer, 'walk' (C), works because it is the base form, and the others are inflections of 'walk' with endings added for different tenses or uses. Distractors such as 'walks,' 'walking,' and 'walked' fail because they include inflectional endings and are not the root; for example, 'walked' is the past tense form but built on 'walk.' Help students by teaching to cover endings, like '-ing' in 'walking' to see 'walk.' Use word sorts and family charts, watching for mistakes like choosing inflected forms as roots or grouping by endings instead of shared roots.

This question aligns with CCSS.L.1.4.c, which focuses on identifying frequently occurring root words and their inflectional forms. A root word (or base word) is the main word before any endings are added, and inflectional forms are versions of the same word with endings like -s, -ed, or -ing added; for example, 'look' is the root word, and 'looks,' 'looked,' and 'looking' are its inflectional forms—they're all forms of the same word 'look' with different endings. In this stimulus, the task is to identify an inflectional form (or 'ending form') of the root 'clean' from the choices, where 'cleaning' is the form with the -ing ending. The correct answer, 'cleaning' (B), works because it is an inflection of 'clean,' adding -ing while keeping the same root and meaning. Distractors like 'clan,' 'clear,' and 'clown' fail as they are unrelated words with different roots and meanings, not inflections of 'clean.' To teach, practice adding endings to roots like 'clean' to form 'cleans,' 'cleaned,' 'cleaning.' Use word sorts to distinguish families, watching for confusions between similar-sounding but different roots.

This question aligns with CCSS.L.1.4.c, which focuses on identifying frequently occurring root words and their inflectional forms. A root word (or base word) is the main word before any endings are added, and inflectional forms are versions of the same word with endings like -s, -ed, or -ing added; for example, 'look' is the root word, and 'looks,' 'looked,' and 'looking' are its inflectional forms—they're all forms of the same word 'look' with different endings. In this stimulus, the word family includes cat and cats, where 'cat' is the root word, and 'cats' is the inflection with -s for plural. The correct answer, 'cat' (B), works because it is the base form without endings, and 'cats' is formed by adding -s to it. Distractors like 'cats,' 'cut,' and 'cap' fail; 'cats' is the inflected form, while 'cut' and 'cap' are different roots. Teach by covering endings, like '-s' in 'cats' to reveal 'cat.' Use simple family charts and sorts, watching for sound-alike confusions like 'cat' vs. 'cut.'

This question aligns with CCSS.L.1.4.c, which focuses on identifying frequently occurring root words and their inflectional forms. A root word (or base word) is the main word before any endings are added, and inflectional forms are versions of the same word with endings like -s, -ed, or -ing added; for example, 'look' is the root word, and 'looks,' 'looked,' and 'looking' are its inflectional forms—they're all forms of the same word 'look' with different endings. In this stimulus, the task is to identify which group consists of forms of the root 'cook,' and option A lists 'cook' (root), 'cooked' (with -ed), and 'cooking' (with -ing), all sharing the same root. The correct answer, A, works because these are the root and its inflections, with endings added to 'cook' for different tenses. Distractors fail by mixing unrelated words, like B with 'cookie' and 'cooker' (derivational), C with different roots like 'book' and 'look,' or D with words from other families. Teach word sorts to group by roots, and practice adding endings to 'cook.' Watch for errors like grouping by sounds or including non-inflectional forms.

This question aligns with CCSS.L.1.4.c, which focuses on identifying frequently occurring root words and their inflectional forms. A root word (or base word) is the main word before any endings are added, and inflectional forms are versions of the same word with endings like -s, -ed, or -ing added; for example, 'look' is the root word, and 'looks,' 'looked,' and 'looking' are its inflectional forms—they're all forms of the same word 'look' with different endings. The root word stays the same; we just add endings to show different times (looked = past) or different uses (looks = he/she looks, looking = right now), and word families share the same root. In this stimulus, the root word is 'talk' and the inflections are 'talks' (with -s), 'talked' (with -ed), and 'talking' (with -ing). 'Talk' is the root word because it's the base form before any endings, and the other words (talks, talked, talking) are all forms of 'talk' with endings added. A common distractor like 'talked' fails because it is an inflection (it has the -ed ending), not the root word—the root is 'talk' without any endings. To help students, teach them to identify roots by covering the ending: for 'talks,' cover '-s' to see 'talk' as the root; practice common endings like -s, -ed, -ing, and use word sorts to group families by root, watching for students who think inflections are roots or mix different families.