I forget to write my homework down

  I forgot  to write my homework on my  ntebook . So I didn't finishmy homework on weekends . yesterday I went to school ,my teacher was angry with me .He didn't allowed me sit on my chair instead of stand in class . So ,my classmates laughed at me all the time . I'm very wild ,so I had fightment with them .

  But my teacher don't like sove problems by a fightment .He made me cry all day .What shoud I do?