No,
Elementary School is for education. The purpose of early education is to help people "learn how to learn."
Meaning when they later decide to specialize in some skill or trade they actually have the scholarly acumen to be able to comprehend the lessons they need to master it. So it's far more important for kids to know math and understand vocabulary, and develop good study habits etc. Essentially they need general knowledge that can be applied to widest spectrum of subjects.
Bible studies seems more like a specialization, meaning it would better suited for a college major or whatever Preachers and Pastors have to do to become certified and pursue a career in religion
A kid whose main goal is to become an engineer or plumber or what not, would not benefit whatsoever from learning the bible in school.
If anything they should start teaching more about finance and accounting in grade school. because that knowledge can be of use to anyone regardless of career choice.
Back in the days schools even taught basic life skills like shop class, and home econ which have largely disappeared. Stuff like that needs to come back, not memorizing which Disciple is which.