Programs for preventing violence among youth should be evaluated to de
termine if they are effective. Nurses' logs appear to be a useful tool
for evaluating school-based violence prevention programs. The logs pr
ovide a record of students' visits to the school nurse that can be use
d to determine if a violence prevention program is associated with a r
eduction infighting-and other injury-related nurse visits. This method
has many strengths: it is simple and inexpensive, it does not interru
pt the school routine, it permits school-level rather than student-lev
el data collection, it provides a ready ''baseline,'' and it allows co
ntinuos data collection. However, potential limitations do exist. For
example, the method may provide insufficient information and may be af
fected by factors unrelated to the intervention. School officials can
increase the usefulness of the logs by encouraging standardization and
providing training in their use.