1. GeoGebra is free mathematics software for learning and teaching
GeoGebra is free mathematics software for learning and teaching. On the one hand, GeoGebra is an interactive geometry system. You can do constructions with points, vectors, segments, lines, polygons and conic sections as well as functions while changing them dynamically afterwards.
On the other hand, equations and coordinates can be entered directly. Thus, GeoGebra has the ability to deal with variables for numbers, vectors and points.

10. POLY
Poly is a program for investigating polyhedral shapes. Poly can display polyhedral shapes in three main ways:
• as a three-dimensional image,
• as a flattened, two-dimensional net, and
• as a topological embedding in the plane.

11. The three-dimensional images may be interactively rotated and folded/unfolded

12. Physical models may be produced by printing out the flattened two-dimensional net, cutting around its perimeter, folding along the edges, and finally taping together neighbouring faces.
Start „Poly”

13. Tess is a program for drawing symmetric illustrations
Tess is a program for drawing symmetric illustrations. While you draw, Tess will automatically maintain the plane symmetry group you have chosen; 11 rosette, 7 frieze, and 17 wallpaper groups are provided.

14. Pedagoguery Software Inc http://order.kagi.com/

15. Scratch is a new programming language that lets you create your own interactive stories, animations, games, music, and art and share your creations on the web. Scratch is designed with learning and education in mind. As young people create and share Scratch projects, they learn important mathematical and computational ideas. They develop important design and problem-solving skills, learning how to think creatively, reason systematically, and work collaboratively.

16. Scratch programs are built of graphical blocks, the programming code is more readable and shareable than other programming languages. The visual objects and modular code supports collaboration, enabling students to work together on projects
and exchange objects and code.

18. Biology

19. physics
chemistry
Examples

20. Mathematics

23. Enjoy the challenge of eTwinning projects : )
Jolanta Grzywnowicz