Mr. Reed is using his universal screening tool assessment data to get to know his students. He realizes that most of his students do not understand how to subtract three-digit numbers, which they should have mastered in the previous grade. What should he do?
a. Provide reteach lessons to the whole class
b. Provide small group lessons to small groups of students
c. Provide lessons to students one at a time
d. Provide worksheets for homework to catch students up
