Understanding NOT memorizing

 Measuring and using rulers or "primitive" tools as students see them, is not the best and most exciting thing for them to do. Adding numbers or operations makes them feel like they are actually going into a math or geometry class, but when it comes to drive the activity as "puzzle" or as a connecting lines through following points, the calculations and measurements become a quick common sense conclusion.
And that's the idea, THE UNDERSTANDING, NOT THE MEMORIZING OR THE SYSTEMATICAL WAY OF LEARNING.