Sign Up
Hướng Dẫn Dành Cho Học Sinh
Show and tell me if Bob and Sally will have an equal group of marbles.
1. Tap the 
button.
2. Use the 
tool to show me your thinking.
3. Tap the 
and explain.
4. Use the 
to show me what you did.
5. Tap the 
to add to your journal.
