GRE 315, need to retake test in a month

I gave my GRE yesterday and scored Q160 and V155. I have scored the lowest in the actual exam in comparison to all the 15 mock tests which I have given. ( I was scoring between 325 and 320) in all my mock tests. I used Manhattan 5lb, Strategy guides, Around 1k problems from magoosh, official ets material and three practice tests from the big book. 315 is way too low in comparison to the average gre score of the institutes I want to apply to, I just have one month to retake my gre. Can you please give me some suggestions, because I am completely lost as to what went wrong.

I think you can yourself see the problem. In my opinion you’re just covering your weakness by supplying more quantity instead of reviewing each and every mock carefully. After each mock spend a couple of days analyzing why you got the particular question wrong ? was it a concept issue or time management or something else ? Try to maintain a rough log after each test to if you’re improving or not or If you’re hitting a constant than its better to just give the GRE and use your time on other part of your application.

I am mostly left with 5-6 minutes in the quantitative section, even during the actual GRE. I don’t know what went wrong on the actual test day, 95% of the mistakes I made during my practice sessions were because of silly mistakes like not reading the question properly or ignoring certain hidden constraints. It would be great if you can suggest me any resources to improve my score, I have gregmat , magoosh , manhattan and ets.

I think you just have to spent time on reviewing one or two material only from plethora of materials that you already have. I will recommend official ETS material(includes Big Book) + any 3rd party material be it Magoosh , Manhattan or Gregmat etc. Buying new materials in the hope that it will increase your score is not a good strategy.