- Videos and Nets (3D Models) for Making Polyhedron Models
https://drive.google.com/folderview?id=0BwMOiCDa0X1pY3JZcFlMVkdqS0U&usp=drive_web - Teaching Projection.
- Angles between 2 planes
http://ggbtu.be/m2731283 - Projection 1
http://ggbtu.be/m2720103 - Projection 2
http://ggbtu.be/m2731379 - Materials on orthographic view.
https://drive.google.com/folderview?id=0ByNiWGYNa3lbVEVWQmZ4ZzdDbEE&usp=sharing
- Angles between 2 planes
- Activities sheet (Tetrahedron.docx)
- Photo sharing_PPT (Case_School_1)