The two-speed learning method survived, but all our classmates found it difficult to use. Our class uses more instructions and complete solutions of teaching materials. Personally, I prefer nudge. It is not only an explanation book, but also many exercises. It made me master the knowledge points and consolidated them through practice. It is because I have used nudge for a long time that my grades have improved rapidly. At present, my grades are in the top ten of the whole school, which is the pride of my parents and teachers.
I strongly recommend that you use a nudge, and you can be as good as me in the future.