There is an interesting paradox in teaching: the better you know a subject, the harder it is to talk to beginners. Experience means you have forgotten what tripped you up when you were a beginner.

Consider typing. Or division. Or even reading this sentence. Easy now, right? Looking back, it’s hard to remember why they were hard. Looking back, the stumbling blocks are invisible.

An excellent post on the Codecademy blog talks about this issue, and how you can make yourself a better teacher by guiding students around these stumbling blocks.