Does every murican school have science fairs?

Some do...my high school did, but definitely not all schools have them.

I never had one. I've had plenty of book fairs though

our high school has one ever year. at least they did when my kids were there.

I don’t think we ever had a science fair

Some do in bigger cities. We never did.

I only went to school for a few days..

It was mandatory in my middle school years, 6 thru 8th grades

Some do.

Not anymore!