This course is intended for K-12 teachers to explore the world of meaningful and dynamic mathematics, featuring modeling with GeoGebra, Strip Diagrams, and real-world problem solving. Participants are expected to adopt a playful perspective on K-12 mathematics and explore the nature of mathematics, the processes of sense-making, and mathematical modeling for the purpose of meaningful K-12 mathematics teaching and learning.

The **seven** units are best taken in a sequence. However, if you choose to play around, it is absolutely fine. In that case, please complete Unit 1 first because it provides some technical background. Unit 2 through Unit 7 are loosely connected. So do feel free to jump around.

In preparation for the August 21, 2017 Total Solar Eclipse event, we have designed **Unit 6** around this once-in-a-lifetime astronomical show so that you could explore some big mathematical ideas with your students.

**As you go through a unit, the main components will be automatically marked as "complete"; other extra pieces, with a solid box to the right, can be manually marked as "complete."** Have fun!

Lingguo Bu, Jackie Cox, Mary Wright