Helpful Hints!
There are many ways for students to recall things.
Recognition
Recognition is when you can recognize stuff you've already learned. So if you take notes and study them; on your next math test you're gonna be able to RECOGNIZE the formulas and use them.
Recalling
Recalling things is when you recall using that information in the past. So you used recognition on another test so your next test you get a question and you can RECALL using that same formula on a different test!