Things that irriate me

Things that irriate me is when I running late for school.When Im running late school it ruins my whole day because I might miss my bell ringer and my teacher might not accept it.When I walk in classroom late my 1st period teacher might ask me why im late, if its not a good excuse my teacher mark me tardy,and thats what irritates me the most.When I walk in the classroom late I get embaress because my teacher go on with the lesson and I get lost and behind,and I don't want to be disruptive in class.