user: liu3hao
98 karma | created 14 years ago
recent submissions
20 days ago|discuss
20 days ago|discuss
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5 months ago|discuss
Suggested Schematic Standards
(hackaday.com)
1 pts|6 months ago|discuss
11 months ago|discuss
1 year ago|discuss
1 year ago|discuss
Ultimath: A tool for elementary math (feedback please)
(ultimath.com)
1 pts|13 years ago|discuss
13 years ago|discuss
ShowHN: Learn the Model Method with the Whiteboard
(ultimath.com)
1 pts|13 years ago|1 comment
Singapore Model Method
(ultimath.com)
4 pts|13 years ago|discuss