liu3hao

Recent Submissions

1. 1. ▲ Suggested Schematic Standards (hackaday.com) 1 point · 6 months ago · 0 comments
2. 2. ▲ Ultimath: A tool for elementary math (feedback please) (ultimath.com) 1 point · 13 years ago · 0 comments
3. 3. ▲ ShowHN: Learn the Model Method with the Whiteboard (ultimath.com) 1 point · 13 years ago · 1 comment
4. 4. ▲ Singapore Model Method (ultimath.com) 4 points · 13 years ago · 0 comments
5. 5. ▲ Singapore Math Model Method: Ultimath Whiteboard (ultimath.com) 4 points · 13 years ago · 0 comments