Developmental psychologist Lev Vygotsky defined what the person
or a student can do — or the problems they can solve — as three
different stages: - What a student can do on their own, working
independently or without anyone’s help. - What the student can
do with the help of someone. - What it is beyond the student’s
reach even if helped by someone else. He called the second stage
the Zone of Proximal Development (ZPD) which had, as said, two
limits: the lower limit, which was set by the maximum level of
independent performance, and the upper limit, the maximum level
of additional responsibility the student can accept with the
assistance of an able instructor. But Vygotsky believed that
learning shouldn’t follow development, but rather should lead
it. A student should constantly be reaching slightly