Computers Allow Teaching Mathematics as Art or Music

Mathematics Should be Taught Like Art > Conclusion > Pianos Make Music Accessible Like Computers Make Math Accessible
Computers allow children to play with mathematics, learning through low-cost failure and experimentation. Similar to how paints and a canvas allow exploring art, or a piano allows exploring music.

 Trigonometry on the High Seas

The Importance of Mathematics in Seafaring > Similarity > The Origin of Trigonometry
Early sailors had to be excellent mathematicians.