Here are some fantastic thoughts on whether it is a sin to send our kids to a secular temple for their schooling from Bojidar Marinov.

“So if you’re asked point-blank: “Am I in sin by having my kids in public school?” How do you respond?”

My answer: “Yes, you are. Just as much as you would be in sin if you sent your kids to the local mosque five days a week.” If they hate you for that, they will hate you for that. But some will be stung in their hearts who won’t be stung if you took the softer approach.

If you are a Calvinist, you should know this corollary from Calvinist soteriology: The reprobate won’t become less reprobate because you were friendly and soft; but the elect will be driven to respond if you speak as one of authority, not like their academically-feminized seminary professors (Matt. 7:29).