If you want to come right down to it, the creation of the universe has never been observed, and neither has macro-evolution. Neither meet the criteria of being observable and therefore fall outside the field of science.
Only integral calculus from now on -- is that what you really want??!!
I want my kids to learn both sides! That's the honest way!
Please do not try to pontificate about what is and is not science when you clearly don't understand the subject. Your statement is false at an elementary level. You're misunderstanding what it means to make a scientific observation. It does not mean necessarily actually being able to sit there and watch a thing or process as it takes place in front of you. Indeed, if we could do that in all cases, we wouldn't need science in order to investigate them. Science exists precisely to explore the things which *aren't* so directly apparent.
What needs to be "observable" in science is not necessarily the thing or process being explored, but its consequences, its effects, its results -- the evidence of its existence and/or workings.
And there is a vast amount of evidence along multiple independent cross-confirming lines that macroevolution has occurred and been involved in the production of modern life forms, and is still taking place today.