Happy Teachers Practice Self-Care

Secure your own oxygen mask first before assisting children.

That saying aboard planes has resonated with Danna Thomas, a kindergarten teacher in Baltimore who founded a teacher-support group called Happy Teacher Revolution.

"We can't be there in our fullest capacity to teach kids if we're not in our fullest capacity ourselves," she said. "No matter how strong your lesson is, ... it could all be perfect, but I personally cannot deliver a lesson to the best of my ability if I don’t get a full night's rest, if I don't eat on my lunch break."

Every Friday during this past school...