Simulation Resources

Phet Simulations
https://phet.colorado.edu/en/simulations/category/new
This site it provided by the University of Boulder.  An excellent set of simulation activities.  Teachers can search by subject, grade level and device.

NCTM Illuminations  K-12
https://illuminations.nctm.org/Games-Puzzles.aspx
Great math interactives. Search tool by Common Core Math Standards, NCTM Standards, math concept and  grade level. that can integrate

Visnos
http://www.visnos.com/app
Provides great interactive/simulation math resources. “addition and subtraction facts, angles, measurement using a protractor, telling the time, multiplication and division. Types of numbers such as factors, multiples, square and triangular.

Geometry Toolbox (requires flash)
http://www.emaths.co.uk/images/tutorials/geometrytoolbox.swf  
An online toolbox including compass, protractor, ruler, pencil, pen and a blank slate to create.

Robocompass
http://www.robocompass.com
Geometry on 3D. Uses programming commands to produce Geometric constructions, patterns and tessellations. Best suited for grades 8-12. Go through tutorial with your class and learn together. Looks simple but this is a powerful tool.