Evolution of humans from monkeys/apes/whatever has not been proven, just as creationism hasn't been proven either.
Perhaps other animals have evolved from other base life forms, but as it stands now, it is not fact that we came from monkeys/apes.
Many times evolutionists have tried to present data on evolution from monkeys and every time, it's been disproven.
So neither should be taught in school (in regards to Monkey->Human), since neither has been proven fact.
I took World History to the 20th Century about a month ago; evolution has not been proven.
O______O
Humans didn't evolve from monkeys, no-one who actually knows or has studied evolution will ever say that we did.
Humans and Apes have a common ancestor, but we have evolved separately in different habitats and niches over millions of years to cause large phenotype differences thanks to variation and natural selection.
Actually, the line of Human evolution can be tracked quite successfully by fossil records.
As can horse evolution from a small deer-like animal.
As can the evolution of a fish to an amphibious animal with legs strong enough to walk on land.
As can the evolution of birds from the Velociraptor Genus.
So yeah, sorry to burst your bubble but Evolution is fact, it is supported by thousands and thousands of pieces of fossil evidence.
People always say you can't -see- evolution, but sure you can, just look at your pet dog. Features are bred in to dogs (and pastoral animals) for hundreds of years to emphasise features that we want them to have, as the animals become more and more genetically different (different breeds can vary a lot!) it gets more and more likely that they will become sexually isolated from the other breeds and ta-da! Speciation has occured, in the same principles of Evolution but under human control (and taking much less time).
Should Creationism be taught in schools? Sure, but it should be taught in RE/RS/Relgion Class/Whatever and be given to the children as a
story not a fact. Evolution should be taught, it is scientific fact, without it there isn't much point in having biology in school at all really.