The room 203 where the author teach is created specifically for troubling students who fail to follow normal curriculum due to adversities that they faced in their life. In that room, the author learn so much about the struggle that the children have to overcome and obtain a hope that she might do the same in her life.
The answer to question presented above would be the act of checking into Room 203. The event in "Diary 24" from the Freedom Writers Diary by Erin Gruwell that gives the author hope that he has a home and a future would be checking into Room 203.
