Published research of Hilda Taba to test the hypothesis that if given curriculum designed to develop cognitive functioning and taught strategies designed to develop cognitive skills, students would then master more sophisticated symbolic thought earlier and more systematically than could be expected if this development had been left to the accidents of experience or if school experience had been guided by less appropriate teaching strategies.
This text is a remarkable outlier from the 1960s, which captures the current debates about concept based learning and the complex nature of teacher choices and context in a way that resonates perfectly a full 60 years later, and still feels cutting edge. A foundational text for concept based teaching and learning - not surprisingly it had a huge influence on Lynn Erickson who references it in a number of her works.