From Kitchen Table Math (go there to get the link to the letter)…
In a December 19, 2008 letter to the editor of the Frederick News Post, Steve Wilson, a math professor from Johns Hopkins University, issues a warning “not to the newspaper or to the board or the teachers, but to the parents. If your child goes to a school that uses TERC Investigations, you should understand that it means your child’s school has abdicated its responsibility to teach your child mathematics. By doing so, the responsibility now rests with the parents. Good luck.”
Amen.
