Child development
Vygotsky thought that important learning comes from working with adults or more skilled peers.  These helpers can help the child to find out how to do different jobs. Vygotsky thought that there is a  range of difficulty that a job needs to be in. If the job is in the range than a child can learn best. Vygotsky called this range the zone of proximal development. The zone of proximal development has jobs that are to hard to do alone but are able to be done with help. The help would come from a helper.