You can get the notes from you teacher or your lecturer. However, if they are not available, the website is full of study notes for every topic. So you can try and search for that topic online and download them for study.
lol One time my book bag was all wet and all of my precious notes were all wet. I was like in this bad mood until I had finally realized that I didn't need this dirty notes I had the answer all here. My brain so I recommend you start remembering and start not watching t.v. :P