man, if you are scoring that low, you really need to hire a tutor to improve 300 points! it depends on which tutor you need. if you are weak in verbal, hire an english tutor and if it is math hire a math tutor. you don't have that many days left. honestly to improve 300 points is pretty difficult, especially in a month unless on the official exam you mismanaged time and forgot to answer 10 questions. otherwise, you need to seriously review all the topics and hire someone to help you so it won't be too time consuming.