Generally speaking, the priority order of data is as follows:
True questions (machine classics) > official questions > questions written by local educational institutions in the United States > questions written by teachers or institutions in other countries.
Theoretically, it is enough for a student to do the first two at most.
1, fill in the blanks and read
At present, there are more than 1000 machine classics on the market, and it can be verified that the original ones have been included in GRE machine script 1400. At present, there are more than 300 kinds of machine classics on the market, and the latest machine classic is the 320 GRE machine classic. Then combine these materials with the text analysis of each topic to complete the exercise more efficiently.
Secondly, OG and 150: Generally speaking, if you are not a student who is very skilled in mechanical engineering, you don't need to do OG and 150, because these questions are old, at least three years old, and the way of writing them is a little different from the current exam. OG, 150 questions will not appear in the exam again.
There are also some materials, such as Magoosh, Princeton, Kaplan, Barron and so on. , which belongs to the topic written by American domestic educational institutions. From the actual experience, they are different from the real questions and are not recommended.
In addition, you can use official PP2, PPO and PPP for a model test before the exam to master the rhythm of the exam. After all, it is also an official topic. There are also some teachers in China who publish their own so-called questions. Viagra has been seen, which has no reference significance and is not recommended.
2. Mathematics
Mathematics is a strange subject, that is, the recommendation degree of its official real questions is similar to that of some unofficial real questions, because the difficulty of GRE mathematics has improved in the past two years, and now the proportion of students who can get 170 in the math exam is not high, so "Math Questions 170" is a very good preparation material.
There are few machine classics in mathematics, such as Ge Wei's 200 Machine Classics in Mathematics. In addition, in view of the trend that mathematics is becoming more and more difficult and pit-ridden, we have sorted out the classics of machine examination from the summer vacation of 20 18 to now, most of which are difficult problems, and have been updated to 360 questions at present. (The Latest Memory Edition of Mathematics)
In addition, there is a new mathematics textbook "400 questions of the latest mathematics machine classics of GRE", which are all new mathematics questions in the GRE exam in 2020. I strongly suggest that you do it again and understand it, which is very helpful to solve the problem.
At the same time, we will also recommend some other topics, such as the math problems in the official 150 and OG, and then the difficult math parts of magoosh can be done. There are many pits in it. If you can understand this pit first, you won't be cheated by ETS routines during the exam. After all, the math routine is not that complicated.
In addition, if students have a poor foundation and many knowledge points are in debt, they can learn GRE math full marks, which contain explanations of all math knowledge points and summaries of high-quality math problems.
In short, you must choose the most effective materials for your preparation efficiency and try to avoid some unofficial problems!