This type of agreement is very common in Emergency Services. Normally these agreements cover EMT's seeking to go to Paramedic School. The biggest difference between the agreement you want, and the one in the link, is that the EMT normally is still working for the company/city while going to school. Still this agreement should have the major points you are looking for. http://www.usfa.fema.gov/pdf/efop/efo41072.pdf
The agreement starts on page 61, Appendix D.
I do not beg for kudos.