Times are changing, where students come to school tired, dirty, and unprepared. Some students take care of their younger siblings to get them to school. Parents need to take more responsibility in helping their children. In years past, I had students who were diagnosed with Attention Deficit Disorder. My first year of teaching, I had a student kick my shin, sock my arm and threaten to sue me.
Some students have issues at home and run away from the classroom.
One student this year kept banging his head on the table to get attention. Many behavioral problems are just students who enjoy talking a lot and not getting their work done. We control our class by having a salary system. They earn a salary for working, they are able to get bonuses a good job well done and on the flip side can be fined for misconduct. Parents donate pencils, erasers, used toys etc.