It's new to you. Of course you're not going to know how things usually pan out.
I've 5 children. On my first I thought everyone should update me on every minute of their day. I was disappointed when the same kids got star of week or some shite like that. I use to will the teachers to come and tell me about my child's day and how great they got on. But it doesn't happen. You'll hear alright if there's a problem or they've misbehaved. By child number 5, I was actually hiding from teachers willing them not to speak to me or phone me. If I got through a day where there was no phone calls or notes home or teacher pulling me aside, I was very happy.
Alot of schools worldwide are trying to get rid of gold stars, child of the week, child of the century, best child for attending school, best child for never being sick.... Basically everyone's a winner 😂 best thing to do is print up a reward chart for at home. I did this because of my gang and they were lazy feckers who hated doing anything. I just googled reward charts and there's lots of templates online, stick in their name, job to be done, you can add in the reading, homework etc then a prize at the end of the week, something small and cheap. A kid gets very excited over a pack of bubbles.
With regards to the trousers, your son has sensory issues? My disabled dd has too. It takes time to find clothing that they like. I spent about 2 years feeling seams on clothing 🙄 dd can't bear seams. Tags, stitching, hard material, anything around neck, anything on head, socks, shoes, you name it. When we find something that she likes we buy it in every size and stock up. I remember buying seamless socks from M&S, the special needs clothing shops were so expensive, I think we bought about 50 pairs, I think they thought I was selling them. It does take an age to find clothes suitable, it's trial and error. I've sent back more clothes than I kept but when you find something that's right, buy a ton of it.
You are going to have lots of conversations over the years where the other party, forgets, denies having, that's why I email everything. No one can deny when it's in writing.