Easy Java Simulation, an innovative tool for teachers as designers of   gravity-physics computer models
  This paper is on customization of computer models using the Easy Java Simulation authoring toolkit for the Singapore syllabus, based on real astronomical data, supported with literature reviewed researched pedagogical features. These 4 new computer models serves to support the enactment of scientific work that are inquiry centric and evidence based that are more likely to promote enjoyment and inspire imagination having experienced gravity-physics than traditional pen and paper problem solving. Pilot research suggests students enactment of investigative learning like scientist is now possible, where gravity-physics comes alive. 
Loo Kang Wee, Giam Hwee Goh and Ee-Peow Lim
physics.ed-ph physics.comp-ph