When it is God's hand which is holding atoms together, which is the reason God belongs in the science classroom.
Yes, but God is not a testable theory. Science does not seek to prove or disprove God. God is beyond our small understanding of the universe. And science is a tool that we use to probe and understand our tiny corner of God's universe. That's all it is; it is not a commentary on the nature or existence of God. And, secondly, why on earth would you want public school teachers teaching religion to your kids? I sure as heck don't.
"Yes, but God is not a testable theory."
Neither is evolution. In fact, evolution is not observable, reproducible, or predictive in nature, arguments that deliberately confuse macro-evolution and micro-evolution (or adaptation) to the contrary. Therefore, by definition, the Theory of Evolution is not valid science. It's the creation myth of atheists and is being propped up by a group of scientists that are terrified that someone's going to start paying attention to that man behind the curtain.