I feel like this is a bad analogy if you are trying to support the idea that teachers need to make their own lesson plans. Could you imagine if every programmer had to build their own programming language before using it create software? Nothing would ever get done.

Instead, the vast majority of programmers just use one of the many existing programming languages.

Please illuminate how 3.7 million teachers need to spend their summer drawing up a new set of lesson plans every year.

> A similar question might be “why would you invent a new programming language, when you could just use an existing one?”

Great question. Because I want to. I'm not complaining about it demanding sympathy because I lose my summers working on it.

I have no problem with teachers who want to create their own lesson plans, rather than using existing ones. I'm just not buying the complaining about what a burden it is to reinvent the wheel, when they can use last year's, or a fellow teacher's, or buy one off the internet.