@JimmyJ,
You believe that is "basically impossible to teach Biology without" evolution.
But such is your belief.
Species decay only, and they do solely degenerate because such is the path of the elements of the universe: older stars produced heavy elements and recycled them, new stars do not produce heavy elements but recycled them only; new stars produce metals. Planets do not produce and less do not recycle heavy elements but recycle metals.
As you can see, the newest steps are a decayed out coming from the oldest status when the elements were produced more complex while today they are becoming more and more simpler. To this continuous losing of characteristics we call it "degenerate steps" and decay, because the losing of properties.
Species cannot go against the decay of elements, and we have observed former species with hundreds of teeth and more characteristics than the ones found with their descendants.
The theory of evolution goes against the fact that elements solely decay, and for this reason this theory is not worthy to be considered.
So, the theory of evolution is not needed at all because the only fact in this universe is that everything decays including the species.
If you believe in a good for nothing theory like the theory of evolution, you are free to do so, but remember that doing so you are creating your own religion. In order for the theory of evolution be considered as science, it must go in accord with other branches of science, and this theory of evolution goes against physics.
So, between these two beliefs, creation and evolution, the belief of creation is 100% in accord with reality and inspires to moral principles and similar, while the belief of evolution is a good for nothing religion.