Thank you all for your responses. We have 3rd grade math and reading differentiation at this point, but it sounds like it is being provided during other "boring" times and not specifically during math class. The teacher, principal and school have been incredibly receptive as my husband and I have advocated for changes. This is the only reason I felt comfortable asking DS how he would feel about telling the teacher. I was surprised by his response as he is quite outgoing and hasn't been afraid to tell the teacher when she has made an error. "Actually Mrs X, the sun is composed of...." I did decide to e-mail the teacher and explain the situation. We are going to watch and see how the remainder of the week goes. Thanks for encouraging me to take action.