This year, my fifth graders have been recording math vocabulary in their journals. They write the word, their own definition, and an example (in pictures or numbers) as well as a non-example of the term.
The word "quotient" might show a problem with the quotient highlighted for the example and the dividend or divisor highlighted for the non-example. I recently made a little vocab record sheet to help with organization. I uploaded it to Google docs if you want to grab your own freebie.