Hi Yesim, yes there is a very effective and simple method of studying.
First: Write it down. If you are taking classes then you should write notes about the key points that your teacher says.
Second: When you get home read your notes and any course work that you have studied that day. If you don't completely understand something write down what it is and make a point of asking your teacher. Then put your notes in an order that you can easily read them again.
Third: Read your notes again after a week. This is very important because it will be the third time that you have read what you had learned and your brain will be almost ready to commit it to long term memory.
Fourth: Read your notes again. Your brain will now be able to easily access the information that you have stored.
Student or Learner