In the early 1990s Graham Nuthall and Adrianne Alton-Lee developed a model of the learning and remembering process which has profound implications for teaching and learning at all levels. Using their model they were able to predict what selected primary school students would and would not learn and remember from the teaching of a series of Science and Social Studies units and to do so with an accuracy of between 80 to 85 per cent. The Nuthall model states that for a student to learn and remember a new fact or concept he or she needs three to four learning opportunities with the complete set of information needed to learn the new fact or concept, and a gap of no more than two days between any pair of those two learning opportunities. It had always been Graham Nuthall's intention to test the model he developed with Adrienne Alton-Lee in a series of experiments. Tragically, Professor Graham Nuthall died before this was possible. The ten experiments in this thesis put the Nuthall model to the test.