Materials were written for an entire year's course in geometry in which transformations were used to develop the concepts of congruence, similarity, and symmetry, as well as being a vehicle for proof.

About twenty years ago, Olgur Celikbas attended a conference on algebra in Turkey. He and his then girlfriend, Ela Özçağlar, had recently graduated from college in Ankara; both had studied math. At ...

Why Don't Kids Good at Math Major in It? Want your kids to become math nerds? Give them recognition and help spark their interest in the subject. It might sound like common sense. Yet there's a ...