These are skills that all first graders need to have mastered prior to second grade.
Write, compare, and order numbers to 120 (1.1.E)
Quickly recall addition facts and related subtraction facts for sums equal to 10 (1.2.G)
Ask and answer comparison questions about data (1.5.B)
Select from a variety of problem-solving strategies and use one or more strategies to solve a problem (1.6.D)