Actually, it’s safe for teachers and staff, as well. There is plenty of evidence that elementary age children, at least, do not contract or spread the virus.
Yes. Most of the schools in our area have been fully or mostly reopened, back to in person learning since the school year began in August. Not 100%, but a lot more than the possible 1 day per week, limited to 8th grade and under, that Biden is considering to be “back in the classroom”.