The exact date of the last common ancestor humans and chimps had is in question but the fact that we had on is not. Our understanding of the sun and how it works changes with time but we no it exist. The evidence that stars are really distant suns is really no stronger than the evidence that species changed and evolved over time or that the started with simple and moved to more complex. If you want to believe evolution was guided by god there is no way to prove a negative but don't doubt it happened.
I accept evolution as a fact and theory, but quite like the following quote on scientific facts:
'A fact is a hypothesis that is so firmly supported by evidence that we assume it is true, and act as if it were true'
It shows that science remains open minded, it will treat it as true, until such time as evidence comes up to suggest otherwise.
It does mean though that I think people should be wary of treating any scientific facts / theories as absolute, unchanging truth, as that isn't the case, and could create doubt in science if they see things change (such as some reactions to reclassifying Pluto as no longer being a Planet, after so long being taught that there are nine Planets in our solar system).
Talking to my wife, we came to a landing that when teaching science, then there is only place for the theory of evolution, but that there could (should?) be religious studies available as well (unbiased / covering a number of major religions) that can go through the different beliefs around creation etc, as creation science and most similar ideas have originated out of religious ideals, even if they are not limited to such.
I found the following links today that I thought have some interesting information about these sorts of discussions:
http://undsci.berkeley.edu/article/0_0_0/howscienceworks_20
http://undsci.berkeley.edu/article/0_0_0/sciencetoolkit_06