Challenges of Lesson Study in UFRJ
Descartes’ Dream with van Schooten
Using Historical Sources on e-textbook/d-book

Masami Isoda and Yuriko Yamamoto Baldin

サンプル1 : Van Schooten (1646)
サンプル2 : Japanes Textbook (1943)



Yes,you can!



It may be...



Wow, it is a



DGS on TEXT



Prooving



Problem Posing



Math Activity



Yes, I met