1954 Change in learning occurs as result of stimulus- response mechanism. Necessary to master the beginning lower level skill before progressing to next level. Many computer drill and practice software fits this model. There are biological stages in these constructs based upon maturity. These can and do occur together generating an equilibrium or equilibration.
Humans grow through series of cognitive stages.
The growth of knowledge. Vygotsky introduced the notion of the 'zone of proximal development. Teaching reading comprehension in elementary schools. Dubbed communities of learning. Kids leading reading discussion.