I used the student's past precalculus tests to prepare a set of problems targeting the types of questions that had previously challenged him. Specifically, we reviewed algebraic solutions to equations involving exponential and logarithmic transformations, as well as subtle domain restrictions (e.g., given f(x) = x^2 and g(x) = sqrt(x), f(g(x)) = x, but x must still be greater than or equal to 0 due to the restriction imposed by g(x)). We also derived the proof of the rotation transformation in 2-dimensions, in order to better understand how a hyperbola might be rotated around the origin. Given a rotated coordinate system XY and the "natural"ù coordinate system xy, this involves representing an XY function in terms of xy through algebraic substitution.
We also used his current chapter in AP Biology as a springboard for a discussion of memory and learning. I specifically asked him about his understanding of memory, and how he attempts to learn and remember the new material he reads. He said that he simply reads it and tries to remember what he read. I explained that there is a common misconception in our culture that memory is automatic or genetic or just sort of happens on its own, when memory is actually a skill that can be practiced and improved like any other. I then elaborated on ways to improve memory.
First, I mentioned the importance of appreciating hierarchy when trying to learn and remember new information. I explained this by pointing out that we will never make it through the simplest of short stories if we insist on understanding every detail of the mechanics of the car the main character drives, and the coffee he drinks, and the newspaper article he reads on page two. In other words, we are constantly attempting to understand big pictures without having enough time to understand the details of all the little pictures that form the big ones. Given this reality, we must learn general processes, i.e., the skeleton of a story, before we can really start to see how all of the little processes come together, even though we don't necessarily know exactly what the little processes are. This means that we must always come to understand complex material by passing over it many times, first taking in the most general relationships, and then slowly expanding our understanding of the details that connect those general relationships. Then we slowly expand our understanding of the details that connect the first set of details... etc... and it is through this process that we come to understand the deeper connections of dense material over time.
To put this concept a little differently: our general understanding of any relationship is always a necessary foundation for our detailed understanding of that relationship. In short, we must accept that reading the same material multiple times is often a necessary component of learning that material deeply. Only very simple subject matter can be comprehensively understood at first glance.
We also discussed the power of associative memory techniques. I mentioned that when learning new information, it is helpful to think of that information in many different ways, even using different senses. In other words, the linguistic, visual, aural, practical, and emotive nature of new information should always be given attention. This practice will create additional pathways to the same memory, thereby increasing the likelihood that we can find a way to recall that memory. Relating new information to our sense of personal identity is also one of the strongest ways to improve storage and recall.
I concluded by briefly mentioning Joshua Foer and his research on memory competitions. Foer interviewed many "memory athletes"ù and asked them how they perform such incredible feats of memory. He discovered that most of them do so through ancient memorization techniques which intentionally incorporate our spatial memory in the storage and retrieval of data. They almost universally claimed that they were not uniquely gifted and that they are utilizing a well-practiced skill in order to remember information as well as they do. Skeptical and eager to test the limits of these techniques, Joshua practiced aggressively for a year. After learning the technique, he returned to one such competition as a competitor instead of a journalist, and in 2006, he won the United States Memory Championship. I encouraged the student to look into Joshua Foer's story and the "memory palace"ù learning strategy.
Read more »