Worthy of note I have degrees in engineering and math, not teaching
Making Learning Enjoyable, Free Starter Diagram

Golden Rule (treat others as you wish to be treated) matters in teaching and learning, truth is not all good, less truth is not all good. Golden Rule factors into love that helps min the fin.
Imagine the day children learn puns and word play. I am into math so I don’t realize the power in word play and puns, others that learned might be looking at street signs and start thinking this place is fucked up. The environment looks more aggressive after one lesson as possible is not always known. Right combination of drugs might increase the effect – people are on different medications. I have personally experienced a situation where the environment suddenly turned to A fee in an instant while driving – not all pretty, pretty scary.
All street signs as numbers would be boring, less memorable, words used have potential for problems.