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it is important to teach what is known, what is theorized, what is hypothesized, and the difference between them, and how to approach them critically in a scientific manner.

Correct.

It is known that there are different fossils found in different strata.
It is known that living organisms can be arranged in a tree fracture based on anatomy.
It is known that DNA and protein sequencing arranges them into the **same** tree.
It is known that people have bred, by the simple expedient of only allowing certain animals (or plants) to live, numerous varieties of dogs, crops, pigeons, goldfish, etc, etc.
It is known that, because of mutations and the random shuffling of genes during meiosis, that not all the offspring of a mating pair will be identical, and
it is known that some of them will produce offspring of their own, and some won't.
It is known that part of the reason for this is that different members of the same species are differently-adapted for the environment they find themselves in.

All th above, except the molecular stuff, was known to Darwin.

It is theorized that all of life may be placed in a single tree structure that reflects common descent.

This theory could be falsified by finding an organism with a different genetic code, or an animal (or fossil) intermediate between a mammal and a bird.

It is theorized that random mutation and natural selection is sufficient to account for this.

This theory could be falsified by proving that some structure is "irreducibly complex.

It has been hypothesized that the Bible is inerrant.
It has been hypothesized that the Koran in inerrant.
It has been hypothesized that the Rig Veda is inerrant.
It has been hypothesized that the Diamond Sutra is inerrant.

It has been hypothesized that there is an intelligence "outside" the Universe that was responsible for "creating" it.
It has been hypothesized that the same (or perhaps a different) intelligence is responsible for life.