Keiji was responsible for Lesson 1 (mechanics, chapter 1 - 7), as well as all JavaScript code, calculator applet in the main page, and the circuit applet in chapter 15. Keiji also developed Lesson 3 (electricity, chapter 11 - 15) jointly with Hector.

Kazushi was responsible for the overall layout/design, graphics in Lesson 1, and several GIF animations in Lesson 3.

Hector worked on Lesson 2 (light and waves, chapter 8-10), including all text, graphics/animation, and Java applets. Hector also developed Lesson 3 (electricity, chapter 11 - 15) jointly with Keiji.

Hyun Ku made large contributions on Lesson 3 (electricity, chapter 11 - 15).

The head coach of the team.