Hey, hope you are well.
I'm sorry to hear that you have a low evaluation currently. The best thing to do is to understand your areas of weakness and take advantage of support available.
Your course should have a list of all required knowledge area, maybe as part of a module information pack or available from your teacher. From this you can get a full understanding of everything you will be asked to know and can identify any specific weaknesses. I used to keep a traffic light system of areas I didn't know, areas I was okay with, and areas I was confident with. From there you also know what should be covered by revision notes and resources. To understand how well you understand a topic try writing down everything you remember and then compare it to notes.
A key note for revision is little and often. You will struggle to learn everything to a good standard in a short space of time so spending a little bit of time every now and again will help improve. You could use flash cards while travelling to and from college, I used to have one trip a day as a revision trip.
Be sure to take advantage of any resources your college will offer such as lesson support, revision classes, and study groups. They will want you to do the best you can so it is important to take advantage of things while offered. Don't be afraid to ask for help from your teachers if you feel you need it.
I hope this helps!
Stella - University of Central Lancashire Student Ambassador