A、They spend little time on them. B、They google them on the Internet. C、They read them mainly before exams. D、They take lecture

There is a collection of positive habits and mindsets that make a person so successful in class. Not just a few, but an accumulation of many habits that combine to produce high-level academic performance.
    Here are some habits of top students that you can use as tips to do better at school:
    First, they don’t always do all of their homework. In college, homework assignments generally make up 5 - 20% of your grade, but can be the biggest time-suck for most students.(16)Yes, working problems is one of the best ways to turn new concepts into working knowledge, but a large majority of those problems that take you hours and hours to work through, you’ll never see on an exam.
    Second, they never "read through" the textbook. Per time spent, reading the textbook is one of the least effective methods for learning new materials.(17)Top students use examples and practice problems, but otherwise use Google, lecture notes, and old exams for study materials.
    Third, they test themselves frequently. Testing yourself strengthens your brain’s connections to new materials, and gives you immediate and clear feedback on whether you know something or not. Bottom line, repeated self-testing significantly improves long-term retention of new materials.
    Last, they study in short bursts, not long marathons.(18)Studying in short bursts tends to help you focus intensely because you know there is at least a short break coming. This also fits in nicely with our natural activity or rest cycle of our bodies, which makes studying continuously for multiple hours on end.
16. What do we know about homework assignments?
17. What do top students do with textbooks?
18. Why do top students study in short bursts?