Replying to URGENT POKER HELP

so we are in study hall right now and my advisor just came into my room and said i have to do homework (im at boarding school). anyways there is $25 on the line here and i am evenly stacked with one other kid and everyone else is out. i suck at poker and have no clue what i am doing but for humiliation issues i cannot loose this game. its kinda a long story but if i loose this im going to get shit for it for the rest of the year. so can anyone give me any tips for one on one poker quickly. because its study hall any websites about poker are blocked