Resources to Support Challenging Child Behavior

I work with older students who always fight about who is first in line. Our transitions are difficult to begin with but this makes it even worse. Do you have any suggestions?

At school, my 12 year old Autistic son was working in class with a speech therapist when he just peed on himself. I was told he had gone to the bathroom before. Then he was told to pick up cards he pushed on the floor. When they turned around he was wet. He had an accident the same day and the day before. How can I help him stop this behavior?

I am a graduate student doing a case study on a 6-year-old boy with autism. His mother reported that he often causes harm to his own body frequently. What are some strategies to reduce self-injurious behaviors?