TL;DR: effective communication requires that the language part of the brain of both people map VERY closely. It's no surprise autistic people and NTs don't communicate well together, but communicate very well within their own groups. How much you need to adjust your communication depends mostly on how important it is to get your message across, which if you're a teacher should be a lot. It's your job to communicate effectively lol. Your teacher was shitty!

Honestly I'm mostly replying to the "I'm not reading that but I agree". That made me chuckle. Like I could have had "Aurora_TheFirstLight sucks" in the middle of that and you're all "It's cool I agree lol"