I have a variety of methods because of the differences in their IEP’s.
Generally, I progress monitor academic goals once a month. My school has DIBELS, DRA2 and AIMS Web for that. This is of course in addition to any classwork and quizzes we have.
For Behavioral goals, I try to do at least one structured, ABA style observation per grading period (3x per year). I also have a clipboard with labels on them that I use to take anecdotal notes each day. I’ve seen other teachers do post-it notes. However, when my sheet is full, I stick them to filler paper in my data binder. It’s easier to get the labels to lay flat, which is why I prefer them to post-it notes. One day per week, I go through and write a little summary of patterns I’m noticing, strategies I might try, etc.