What view did Bandura and Piaget have on student learning?

Bandura believed in Observational learning, the idea that students could learn from a positive example. this means that the teachers must be qualified and (according to the results of his bobo doll study) would teach best to students of their same gender. Piaget beleived in the 4 stages of cognitive development, so he would push for the separation of classes into the four stages and of teaching the students only what their current stage allowed them to grasp fully i.e. students in the concrete operational could learn math, but not philosophy, where as students in the formal operational stage are now advanced enough for such existensial quandries