This packet includes 13 warm up drills for mastery of addition facts to 20. Students complete drills for +1 up to +10, doubles, near doubles, and a mixed set. Each drill is just 10 equations for quick assessment. The students advance at their pace and graduate each "class" to move onto the next level. The final level is "college" with a mixed set of addition problems up to sums of 20. I have included a "report card" to record each level that is mastered. This packet will provide the necessary practice to master the CCRS for second grade 2-OA2 but can also be used in grades 1 and 3.