I just remembered something my English teacher did with us when we were in her class. If we said "I can't" write a long essay she'd give us lines saying "I can do it" and it helped our whole class believe that they could do something. We all got A's and B's for our essays in our finals exams. She was an awesome, inspirational teacher that pushed you so you could do well.
Thank you Ms O'Donoghue