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Compare Fractions Interactive ,an open source physics at Singapore simulation
About
This simulation is designed to help visualize the comparing various fractions from 1/20 to 1 for primary mathematics.
more resources can be found here
http://iwant2study.org/ospsg/index.php/interactive-resources/mathematics
Interesting Fact
This app is created by an ordinary teacher, not a professional vendor.
Acknowledgement
My sincere gratitude for the tireless contributions of Francisco Esquembre, Fu-Kwun Hwang, Wolfgang Christian, Félix Jesús Garcia Clemente, Anne Cox, Andrew Duffy, Todd Timberlake and many more in the Open Source Physics community.
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Blog: http://weelookang.blogspot.sg/
Digital Library: http://iwant2study.org/ospsg/