As Mosteller(1989) points out, there are drawbacks to asking students to focus only on what they don't understand. Such an emphasis can undermine both the students' and the teacher's motivation and sense of self-efficacy. To restore some balance, teachers need to focus on what students do understand as well as on the muddy points It can be disconcerting to realize that even your best-prepared, most lucid lecture or lab will be misunderstood or poorly understood by some of your students Initially, a number of students may have difficulty explaining, or even naming, what it is that they don't understand. Becoming effective takes time and practice, and you may not wish to self assessors develop that skill on class time As students become more adept at identifying and explaining the points they find"muddiest," they become more likely to raise difficult questions that you may be unable to answer on the spot level. to more care in listening and studying. Because of the nature of the question however, this technique also promotes introspection and self assessment This is a simple technique that students can easily internalize, making self-assessment a regular part of their own classroom and stud routines. Students can learn to habitually ask themsleves, "What was whether or not other instructors as the muddiest point in them for such feedback