Change in height is easily attributed to improvements in environmental factors - e.g. diet, healthcare, disease, etc. Not evolution, sorry.
No, height is hereditary.
Nope, not exactly. Genetics are a factor in determining height, but environment is a much bigger factor.
Especially when you're referring to the apparent change in humans in the past hundred years; a few hundred years is not enough to explain significant change due to evolution; changes in environment is a much bigger factor then than genetics.
Besides. Height is sometimes more hormonal than genetical: There was a man who was a dwarf for most of his life; then, due to a sudden hormal change, he grew a lot in a very short space of time, to become a giant within a few years. This may have been genetical, but you could still, in theory, give a dwarf a massive amount of hormone injections to make them grow a lot.
The human genome is so complicated that any minor mutations often results in death before birth, or shortly after, or significant problems in the person's lifespan.
Actually, most mutations are neutral.
Not in humans. Very, very minor ones may be, but most mutations present in sex cells (and, thenceforth, a foetus) cause significant problems; humans are very complex organisms, and most of the genetic structure is essential to survival. You'd be surprised how very minor mutations have massive ramifications.
I find the topic title humor inducing, because Evolution by all means is called the Theory of Evolution. So, yes, it is a theory. And you really can't prove anything definately with science anyway, so it's not a fact.
It's a theory and a fact. Fact and theory have different connotations in science terms. Gravity is a theory, too; but I don't see you gluing your feet to the floor.
If science can never be called fact, then nothing can ever be called fact. We know gravity exists; if there is no such force, then there is no explaination for... almost everything that's ever happened, and continues to happen.
Intellegent design should NEVER be taught in a science class.
Not neccesarily. If there was significant evidence besides religious belief for it, then it should. However, at the present time, that evidence is severely lacking.
EDIT:
Not to mention, where does a platypus fit into intelligent design? Its furry, has a duck-like bill, and a beaver-like tail, lives in burrows that it digs, is one of only three species of mammals that lay eggs, and the males even have poisonous spurs on thier legs! 
That actually makes more sense WITH intelligent design.
Simple: God was bored. =D
