flowers – I am suggesting to invert the question: instead of asking “Do I need to keep children home”, ask “Do I need to send them to school”? I don’t know your personal circumstances. The answer might as well be yes, but you uoght to consider it.
As to asking Hashem, there is an idea of asking Hashem to help you make a wise decision first, rather than first come up with a decision on your own, and then ask Hashem to give it to you.