We met with the junior high principal today. He was very nice. It sounds like the school will approve my son to skip Integrated Math 1 and go into the Math 2 for 8th grade.
One problem is that the 9th grade is physically at the junior high. He will have to go to the high school for first period in 9th grade to take Integrated Math 3, then to the junior high, which is very doable.
However, nobody knows if that will still be available in a year since the schools are moving to a later start time. If the schedules for junior and senior high didn't match up for that one year, he would have no math to take since the junior high wouldn't have anything else.
Despite that risk, I think we will go for it. Presumably something would be worked out for 9th grade.