Below are examples of "investigations" in Geometer's Sketchpad prepared by students in my Methods of Teaching Secondary Mathematics class over the past few semesters. An investigation is a self-guided and self-paced worksheet that leads a student to "discover" a geometric property or theorem.
All of the investigations below are PDF files. In order to view and print them, you need to have Adobe Acrobat Reader installed on your computer. If you do not already have it, click on the icon to the right to get your free copy.