My school didn't allow Trapper Keepers. I always thought they were so cool. I also remember Pogs. I had a bunch in 4th grade (at least I seem to think it was 4th grade.) Pogs were a fairly big craze in my area, and I can remember slammers going for close to $50.
Trapper Keepers were not allowed because they didn't fit in our desks (well, the old ones. When we got news ones, the fad had passed for the most part). The teachers got tired of tripping over them in the classroom aisles. I also remember one teacher saying she couldn't stand the velcro noise of the Keepers opening.
I used to use Lisa Frank all the time when I was younger. For Christmas I bought a whole bunch of Lisa Frank school stuff for my younger cousin. She was excited, because it was very pretty and colorful.
believe it or not, I only heard of POG's when I was on vacation in Serbia from my friends who lived in ENGLAND. NEVER had anything to do with them in the States.