Practical classroom management

behavior
the way someone acts
to bother
to ​annoy, ​worry, or ​cause ​problems for someone
to reprimand
to scold or warn strongly
struggle
an enormous effort or attempt; a battle
skill
the ability to do something well
lack
the state of being without or not having enough of something.
improve
to make something better
successful
Having the correct or desired result
despite
even though
harsh
rough, strict, severe