Recent years have seen increased interest in the use of handheld computers for K-12 education. At this time, however, schools that are adopting handheld computers are doing so without the benefit of systematic research on the effective uses of handheld computers in the classroom. The PalmTM Education Pioneer (PEP) program was created to remedy this situation. The goals of the PEP program were (1) to determine whether classroom teachers find handheld computers a useful educational tool, and (2) to aggregate the knowledge base of a large set of teachers using handheld computers in their classroom. This, the final report on the PEP program, is intended to provide information to those interested in the benefits and drawbacks of handheld computers in the classroom.