The problem of retaining the material material, studying, problem, reading, decided

Gypsy

During May I was studying Economics with Curriculum, made all EOC and was sure that Eco would be my strong point. However, it did not prove to be the case. Not long time ago I decided to test myself with Elan Practice Questions and found that I was nowhere. Average score was from 50 to 70% depending on topic. I really spent so much time on Economics from Curriculum and did not expect such results.
Is it worth reading iy for the second time for example? However, it is impossible to go through Curriculum twice I suppose. So how to fight with this “material retention” problem?