History lessons in general are usually handled poorly in school. There is of course an awfull lot of it to learn, and they often seem to take a boring approach to it while it could be so much fun.
Most people seem to think all crusaders where knights templar, scots wore kilts and woad paint in the middle ages, the dutch never had a strong land army, Italy was always a united country, the US won the revolutionairy war without any help, all of Cortez his men had firearms, Egypt only had egyptian pharaos, apple pie was first made by americans and yes, all indians where the same.
Such a shame that the majority of people does not even seem to care about history, since its in the past. Personly I find it intrigueing since it shaped the world we live in today.