Last night I was going to study for a BIG test ,but I has a hard time falling asleep the previous night so I was really tired. I was about to study when I fell asleep. In my dream I was not yet lucid but I just decided to do a RC at that time and BOOM im lucid. But then I realized I had to study so I just thought about all the things I knew and I studied for 30min. I woke up and I thought to myself "Well now i dont need to study" My mom asked if I was done and I said yep It helps if you study while asleep but you can't guarantee lucidy. For me I was lucky.