http://mixinginmath.terc.edu/index.cfm



"Free math resources for K-12

Anyone can just pick up MiM and use it—librarians, after-school educators, parents, teens, or assistants.
You do not need training or special math skills. You can start with just one quick MiM activity and see how it goes before choosing others.

MiM workshops can build skills and confidence. Participants do and discuss MiM activities together.
If you want to participate in or lead a workshop, download materials and use them to conduct your own training.
Anyone who is enthusiastic about MiM can lead a session."