Checks for Understanding

I've recently been searching for resources on how to improve my "checks for understanding" with students. I stumbled upon an article (actually an excerpt from a book) from ASCD where a chapter was dedicated to Checks for Understanding. The chapter describes the process of checking for understanding:

1) "Feed-up" -- clarify the purpose, learning goals
2) "Feedback" -- respond to student work
3) "Feed-forward" -- modify your instruction where needed

Also, I found a great collection of ways to Check for Understanding from Edutopia.