How To Measure Distances on a Map using the map scale? What kind of geometrical transformation is applied? This simulation also focuses on cross product, fraction and percentage.
Very clever and user-friendly simulation. Students love it!
How to encourage more creative thinking? Here you have the beginning of an answer.
4 seasons in a year
One landscape - Four seasons - Two hemispheres. Powerfull illustration of a "not-so-easy-to-teach" phenomenon.