The subject matter is given by the location. Think of it this way, we are students of life on this earth. Also significant is the ocean and sand. So now we know the dream is specifically addressing what you can learn about your approach to life so that you can improve yourself and quality of life. The first thing is the science room.
Science is about exploring our world and finding reasons for things.
This fits in with the above but science also tends to be so technical in its evaluation of things that their original beauty and wonder is lost. This would then imply that you have a tendency to do the same thing. You would know if this is true or not but may be surprised to see your dream identifying you with this. The dream continues on with more. You also say that the ocean looked two dimensional so again the dream is saying that by adopting these changes you will add more depth to your life.