- GeoGebra Activities for Sem's iBook
- practice 1 - the basics
- Chord, Secant and Tangent Line Segments with Circles
- Simple Exploration of y = mx + b
- The angle sum in a triangle
- Medians of a Triangle
- Medians of a Triangle with Centroid and Distances
- Exploring Midsegments in Triangles
- Explore the Hinge Theorem and its Converse.
- Parallelograms #4 - Relationship between Diagonals
- Parallelograms #3 - Relationship between Interior Angles
- Parallelograms #2 - Examining Interior Angles
- Parallelograms #1 - Parallel Sides
- Proportional Measures and Scale Exploration