GMAT Strategy

Well my situation is kind of critical,

I've been accepted into an MBA school with a conditional offer of retaking the GMAT before the start of the spring semester, my test is scheduled on the 22nd, English is a second language for me, and i am facing a hard time in CR and SC, my hit ratio on them is around 40%, all i need for the test is a 512+ but i need to practice to get a higher grade just in case.

What is the best strategy to take to get this score in such limited time?

PS: my hit ratio on problem solving is 80%+

Thanks in advance guys

for CR - I would advice you to read the CR bible of powerscore then try attempting OG questions

also in CR you must know which questions you get wrong often and then attach them
( take the 1000 cr doc and ctrl F the question type and practise)

For SC - starting point would be manhattan SC guide and also learn the list of idioms
would not recommand 1000 sc but run the gmat prep software many times and so as many sc questions from there as you can