How People Learn
The
National Academies Press offers over 3,000 books online for free in addition to their fee-based materials. They focus primarily on the fields of science and health, but also include a section on education. One of the available selections
"How People Learn: Brain, Mind, Experience, and School" (John D. Bransford, Ann L. Brown, and Rodney R. Cocking, editors) addresses the science of learning and thus is particularly relevant to the scholarship of teaching and learning. The text is available at the following address:
http://www.nap.edu/html/howpeople1/