My son graduated from Lyman. It wasn’t too bad back then but looks like it got worse.
I went to the original Lyman building, built in the 20s. My last year (1970) the “new” facility opened just down the road. I believe that campus was at some point also bulldozed and replaced.
I left the area in 1979 and Florida for good in 2006. It was a nice area in the 60s. By the mid 70s the building boom was trashing Longwood and the north Orlando areas like Altamonte and Casselberry.