Watch Your Steps

Enable students to

1.	Understand the meanings of potential, potential difference and electromotive force
2.	Apply concept of potential divider to solve problems
3.	Understand the effect of earthing on potential and its importance for potential comparison

Apparatuses

Included in package

1.	Robot	x 1
2.	Rail	x 7
3.	Base	x 1
4.	Worksheet file (read only)	x 1
5.	Presentation file (read only)	x 1

Not included in package

6.	Screwdriver (for changing rails)	x 1
7.	Voltmeter	x 1

In a double-lesson, teachers could

1.	Begin with the presentation file, guide students to explore the concepts
2.	Invite students to formulate the step sequence for the robot to walk on the rails
3.	Allow students to test their formulations for fun
4.	Challenge students with new rails and with questions
5.	Distribute worksheets to be completed in class

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