I noticed that Michael had trouble with GCF and prime factorization on the diagnostic test. Today we spent some time working on those concepts. He struggled to find the factors of a number, even with a calculator. He seems to know most of the multiplication facts for smaller numbers but struggles with larger numbers. This is hurting him even though he has a calculator because trying to find factors of a number such as 72 is almost impossible if you don't know that 2x36=72 or that 12x6=72. I think I will need to work with him on this.