How do we learn? And how do we learn best? What are the most effective ways of educating today? Our guest on ST is Dr. Sanjay Sarma, who's the leader of the Open Learning program at MIT. He joins us to discuss his new book, "Grasp." This pioneering work looks at the science of learning -- i.e., how the acquisition of knowledge works both in the mind and in the classroom. The book also explores which teaching techniques are most effective -- and why -- and how schools should (and should not) use instructional technology, including online teaching apps and programs. As noted in a starred review in Kirkus: "Compelling.... Delightful as well as convincing in its plea that educators place learning over winnowing and access over exclusivity."