Another extension of the problem statement WTL activity is to ask students to generate problems for an upcoming test. Students might work collaboratively either to generate problems or to draft solutions. By asking each student or group of students to generate problems, students will cover the course material more fully than they might otherwise do in studying. Moreover, if you assure students that at least some of the test material will draw on the problems students generate, they are more likely to take both the problems and solutions more seriously. Furthermore, if students don't understand the material, they will surely find out as they write questions for the exams!
Another alternative for pre-test warm up writing is to give out sample test questions in advance of the exam. Students can work individually or in groups to write out responses. Again, because they know some of the test material will come from the WTL activity, students are likely to prepare more carefully.