One-on-one senior high school entrance examination is better than two books in Beijing. Learn big, learn and think. This is also a good institution in China. I am a part-time teacher of Xi 'an's two families. I can give you two suggestions about mathematics. Both girls and boys need to sort out the knowledge framework. Pay special attention to this when looking for a teacher. Because the knowledge framework is clear, it is usually possible to quickly lock the test sites. As for improving the speed of doing problems, a lot of training is needed. I hope it helps you.