One of the challenges of designing project-based learning in schools is ensuring that students acquire the appropriate range of subject content in addition to doing in-depth research in a specific area. This is where Spaced Learning comes in. By running Spaced Learning sessions in conjunction with extende projects, teachers can ensure that students gain relevant content knowledge without losing breadth of learning.
You can order hard copies of Spaced Learning: making memories stick here. Copies are free (plus postage and packaging).