I am aware of no alternatives sufficiently rigorous to rise to the level of scientific theory. If you have one, post it here and we'll give it the same treatment as the theory of evolution.
That's a gross exaggeration. If you take qm and relativity each 10 orders of magnitude away from the region in which there's any experimental evidence for them, there will be modifications necessary to one or both theories. But, as of now, both theories reproduce experiment within experimental evidence in all cases. There is no experiment which one can do within the forseeable future for which qm and relativity predict observably different results.
In any case, you tried to do an end-run around the point. There are alternatives to qm and relativity out there. We don't teach them in high school. If you dispute this, name one high school that does. The pressure to teach 'alternatives' to evolution does not arise from a wish to be broad-minded in the teaching of science (a crazy idea anyway; funny to see self-described conservatives suddenly embracing 'inclusivity'). Rather, it's an intellectually dishonest attempt to introduce the peculiar beliefs of a very limited set of sects of Protestantism into public education.