Math Facts Practice

One of our daily routines includes practicing addition facts.  Every student has a math envelope.  It has a pocket for their (25 problem) quiz, and a graph on the front for recording their progress. These are not timed. Every child works on the level they are ready for. In our class right now first graders are adding from 0 to 5. As a child reaches 100% on a level, they receive the next level to begin memorizing. I give their quiz in small groups so I can monitor and notice who must count on his/her fingers, or can do the math in their heads. I encourage noticing "patterns" as they add. We are in unit 3 - addition and subtraction. As students move through the addition facts, 0-10, they will graduate to  subtraction facts 0-10.