  Open Source Physics (Brown, 2012; Christian, 2010; Esquembre, 2012; Hwang,
2010) empowers teachers and students to create and use these free tools with
the associated intellectual property rights given to customise (Wee & Mak,
2009) the computer models/tools to suit their teaching and learning needs. Open
Source Physics (OSP) focuses on design of computer models, such as Easy Java
Simulations (EJS) and the use of video modeling and analysis (Tracker). They
allow students to investigate, explore and analyse data which is either real or
simulated. The OSP approach helps users overcome barriers in creating, using
and scaling up meaningful ICT use in education. In Singapore, teachers and
students have created or customised existing computer models to design and
re-purpose EJS models to suit their context and learning needs. Tracker tools
allow students to analyse different aspects of a physics phenomena to deepen
their understanding of abstract physics concepts. Using Tracker, students
record the motion of objects and create their own models to test their ideas in
the study of kinematics. Essentially, the two main pedagogical approaches
(Figure 1) used in OSP are: Guided Inquiry investigating modeled phenomena(EJS)
video analysis (Tracker) Constructionism learning by making new models(EJS)
video modeling(Tracker)
