1. Cabri Figures in Powerpoint To manipulate the interactive figures of the slides, launch a slide show.

2. Cube Cutting Tips to interact with the model (example): You can interact with the model by moving the control points. To identify these points, make a long click in an empty section of the work zone. You will see the points that can be moved blinking.

3. Cube Unfolding To continue to open this cube, use the Manipulation tool and drag one of the faces with the mouse. Lay them flat in order to create a pattern called a net. To open a single face, hold down the Shift key. To open the face(s) in multiples of 15 degree, hold down the Ctrl key (Option on Macintosh).

4. Cone Volumes V1 and V2 are the volumes of the blue and purple cones respectively. While h1 and h2 are the altitudes. Drag points M, H and R. Examine the co-variation of V2/V1 and (h2/h1)3.

5. Eclipse (by Kate Mackrell) Change the distances and the radius of the three celestial objects and observe the effect of each one of those parameters on the shape of the umbra (the region of shadow where the light source is completely blocked).