This activity is a self-evaluation activity for 4th graders. You can use this exact activity to evaluate student knowledge of 4th Grade Math Vocabulary. I use the Marzano "Building Academic Vocabulary" program, and this list is gleaned from my district's academic vocabulary list for Grade 4 Math. We use Everyday Math, so that's where my vocabulary comes from. Basically, I have the kids use this list multiple times during the year (the downloadable version has my full vocabulary list for the entire 4th grade year). It's pretty self-explanatory and a great tool to drive instruction.