This report compares findings from the End of Training surveys administered to Participant Teachers (PTs) who took part in the Classic version of Intel Teach to the Future and who took part in the Expansion version of Intel Teach to the Future. Classic survey data were collected between March 2001 and July 2003. PT Expansion survey data were collected between April 2002 and March 2004. The comparison of data from these two surveys shows strong commonalities as well as differences between these two groups of teachers. In many cases the two groups were so similar that any differences were found to be not statistically significant. Unless otherwise noted, all of the findings presented in this report are statistically significant. It is important to bear in mind, however, that the formula for determining statistical significance is based in part on the size of the sample. Because the sample sizes for the data reported here are quite large, the reader should use caution when interpreting the meaning of statistically significant but otherwise small differences between the two groups. The frequencies for the Classic and Expansion PT End of Training survey data can be found in Appendix A.