Back to School Icons include: schoolhouse, school bus, chalkboard, pin board, students, teachers, desks, chairs, computers, Tablets, readers, portable game devices and balloons.
https://creativemarket.com/sjagiello/collections/8431/Back-to-School
https://creativemarket.com/sjagiello/collections/277042/Vectors
https://creativemarket.com/sjagiello/collections/66479/Picto-People