Ok, DD2 has ASD with no EHCP. There are lots of ways to help, even without masses of support.
Structure: At DD2's school there are 5 lessons per day, with 2, 30 minute breaks. The children get issued an A4 paper timetable, but I then reduce that to pocket size, so she can always refer to it. DD2 has taken to writing the rooms she needs to be in on the back of her hand, so she doesn't have to look at it throughout the day.
5 minute early pass - allows time to move around without being jostled.
Toilet pass - saves trying to use the loo with 100 other people.
My best tip is to buy a multi pocket organiser file. Label one pocket per subject. Then any loose bits of paper go straight in the file.
PE, they rotate through sports, but get given notice about which sport they will do next and whether they need astroboots that half term, etc.
Lunch - our school uses electronic accounts with fingerprints.
Homework is set on Google Classroom.
Secondary is miles better than primary.