Much of it can't. Much of what is taught in physics class can't be proven. Geology teaches what happened over millions of years, how do you recreate that in a lab? Science believes that much of evolution can be proven, through a path that can be traced through a series of transitional fossils. You don't need to recreate that in a classroom for it to be true.
There are (at least to my knowledge) no transformational fossils.
There are literally hundreds of them. Link
As I read this article, I noticed the claim that many fossils haven’t been found yet. A nice disclaimer, but really....!! Again, with all due respect, evolution is premised on something which cannot be proven unless one accepts a whole litany of unproven and unprovable assumptions. Scientists have largely found things they cannot explain (or which have turned out to be clever hoaxes) and have attached meaning to them with no independent scientific testing to verify that those basic premises are even correct. In fact, the whole idea of the “something from nothing” theory has been dis-proven time and again by actual science (such as the 2nd Law of Thermodynamics.) While this may seem like a separate problem, it is not. None of the fossils found actually “prove” that man evolved from lower forms of life - and that that life evolved from nothing. There are no fossils to support that. Yes, old fossils of apes exist, and yes, older forms of what looks to be man (but is it really?) exist, but where is the link? I feel certain that if the link existed it would be shouted from the rooftops - but maybe they haven’t been “found” yet...