Most of high School Math is the intuition that:

• addition/subtraction is about panning the number line or plane or space,
• multiplication/division is about zooming-in/zooming-out of the number line or plane or space
• complex numbers are about rotating a plane
• trignometric functions are about creating waves from rotations or vice versa
• matrices are like lens that squishes and stretch a plane or space

Any form of teaching that deviates from the child grasping these fundamental intuitions is a waste of time. Most School math is devoted to algorithm memorization and problem solving instead of grasping the behavior and utility of mathematical types.