To say that it is hard, against the current and up-hill all the time is underselling it. That said, beyond what is already mentioned in the article, I would suggest the steps that are not explicitly mentioned, but nay have long term impact:
- talk to your partner - it is important that you are aligned on how and why - I had to show my wife directly what is possible before she was able to wrap her head around it
- talk to your school reps - more annoying and you might not get exactly what you want, but in that case even sufficient obstinacy is useful in a sense that it will let you know when they don't care enough that you need to bail
- talk to the parents - somehow even more annoying than school, because school at least is obligated to respond one way or another, but parents don't and will vary wildly -- however, it is likely one of the most useful circles as your kid will interact with their kids