I know of several programs that serve children who need another year between preschool and kindergarten.  They often end up being classes that are primarily filled with boys.  I have spoken to both parents in the classes and teachers of these children in kindergarten the year after who all acknowledge that there are behavior issues in this kind of environment that don&#039;t exist with co-ed.  The teachers feel that in kindergarten the year later, these boys may be fine academically, but are discipline issues.  The parents feel that they have to work twice as hard at home to maintain appropriate standards for their sons.  The amount of aggressiveness and violent play they see at home goes up when their children are in this program.  So if there was an all boys school, this is something that would need to be addressed from the beginning, since I think behavior issues are one of the many reasons that boys struggle in school.  We should not continue the thought that bad behavior is okay because &#039;boys will be boys.&#039;