thanks to prof todd, we customized to a model that is specially tailored to the teaching of the Advanced Level Physics hopefully drawing on the principles of inquiry to find period and radius.
the students would very intrigued by the different planes of the planets of orbits and claim of being like a scientist!
youtube can be found here! hear it from the students :)
enjoy!

http://weelookang.blogspot.sg/2013/03/my-learning-is-enhanced-thanks-to.html
http://weelookang.blogspot.sg/2013/03/i-am-scientist-thanks-to-gravity.html

thanks to prof andrew, we customized to gravitational 1D and earth moon computer models as in the paper.
thanks! prof andrew duffy!

thanks to prof paco, we customized and use java 3d to render this great tool for geostational orbit model.!
thanks prof Francisco Esquembre!