Well, if you believe in God, you know that God is everywhere, so we don't have to talk about Him all the time.
Thus, there's no reason to mention God in typing class, or sewing class or auto repair class, or biology class. God's there, but not particularly relevant to the subject at hand.
It's like prayer. You don't have to pray out loud, you can pray silently and to yourself. Nobody has to know but you and God.
Thst's because the Book doesn't mention typing, or sewing, or cars or biology.
But it DOES touch a bit on CREATION!