... and it is only Kindergarten. Ready for 12 more years?

You've already received good advice, but here are a couple more thought:

Put your requests/concerns in writing. The school gave me grief about not testing my oldest until I gave them a letter. That started the legal clock ticking, and they knew it.

Stay polite but firm. If you don't lose it, they'll take you more seriously. Lose it here... we all get it and have been there!