Bill, that is not such a bad idea. A college year called something like Pre-college or something like that.
We have a program here in TN called junior College (not the normal junior College) where 11th and 12th graders can go to college instead of high school, but they cannot attend prom, sports, or clubs activiites, or anything like that. They miss that part which is important to some.
As for the grid – I am with you! I will run for the hills! LOL