Exam Study and Retrieval Practice

Depending on your school's semester structure, you are either right on top of exam time or will be shortly after Christmas (so I probably should have written this last week).  For those in content knowledge based classes, the best thing you can give your students is the chance to retrieve information from their brains.  

Why?  Because that's how we cement the knowledge in our brains.

It's a technique known as retrieval practice.  It isn't new; it has worked for hundreds of years. But the science revealing how powerful a strategy it is has only been published in the last decade. According to the website retrievalpractice.org, “Retrieval practice is a strategy of deliberately bringing information to mind,” and it is a powerful tool for memory and fluency.

While we typically think of flashcards and whiteboards for retrieval, there are many other methods that we can employ in the classroom.  Using a variety of methods, from brain bombs and summary sheets to Socrative, Quizlet, and clickers to think-pair-share, you can engage students in retrieval practice while preventing boredom.  In my BodyPump classes, Matt will sometimes stop and watch us cary out a movement without his cues. I’ve certainly never been bored when he engages us in this type of retrieval.  On the contrary, I feel empowered to succeed on my own.

Why does it work? Here's where I'll examine just a little bit of neurology.

Your brain cells are surrounded by a layer of fat, called myelin. It serves two purposes:

1. Insulating the nerve to prevent electrical signals from traveling to the wrong place. You wouldn't want a signal intended to contract your heart muscle to go to your bicep instead.
2. Enabling fast, efficient communication of signals. The denser the myelin, the quicker the signal travels.

When practicing a new skill or rehearsing information, the myelin layer around the neuron thickens (myelination), enabling faster communication the next time that pathway is activated.  In physical skills, we call it muscle memory, but muscles don’t remember things as they are just meat.  This thing we call muscle memory is simply a well-myelinated pathway, made of multiple neurons.  According to Stanislas Dehaene, the physical changes in a neuron when memorizing and practicing, strengthen the interconnections between them, “making it more likely that this set of neurons will fire in the future.” 

In the class I take with Matt at the Y, the routine is changed every six weeks or so.  When we first start a new routine, we are an absolute mess.  Hardly anyone in the class is doing the same thing as our instructor, Matt, in spite of the fact that he is cueing it well.  Two weeks later, most of us are getting it mostly right most of the time because we now have pathways that connect one move to the next due to myelination.  The same is true of academic learning.  As we retrieve the memory, we grow the myelin, allowing us to retrieve it more efficiently the next time we need it.  Thus, the old adage, “If you don’t use it, you lose it” is true because when we don’t practice something, we lose myelin or don’t myelinate the neuron in the first place.

I'm not suggesting that we use rote memorization alone.  The learning is obviously "stickier" if we connect the information to meaning.  But that can be done during retrieval.  Encourage students to go through their flashcards more slowly than they usually do, pausing to ask, "Why is this the answer?" or "Why isn't it a different answer?" As Kevin Washburn says in The Architecture of Learning, “Data not processed is short-lived.”  He makes the point that knowledge and thinking cannot be separated from each other if there is meaning to the content, which is why we often talk to ourselves (even if it is only internally) while attempting to learn something new. In How We Learn, neuroscientist and author Stanislas Dehaene describes how brain imaging reveals this “processing depth effect,” explaining that deeper processing activities activate areas of the prefrontal cortex that form loops with the hippocampus.  He does not advise one preferred method of deep processing but says that “all solutions that force students to give up the comfort of passivity are effective.”

It became trendy a few years ago to downplay retrieval and knowledge. People called it "drill and kill" because, for some reason, we believe things more if they rhyme.  As an experienced teacher, you know it works. Research from both neurology and psychology demonstrate that it works. Use it early, often, and without shame.

Since people Maybe we should start calling it "drill for skill."