You mention in your response about teachers using preassessmentsto determine if students already understand a topic so he or shecan move on to a topic not mastered yet by students. Most of theteachers I have worked with begin the year with a review to checkif the students forgot the content during summer vacation. Ifstudents remember the concept the teacher uses the review as aspringboard to the next lesson. If students struggle the teachergoes into a more detailed review reteaching important aspects ofthe content. You also mentioned about teachers basing instructionaldecisions on assessments. Do you think teachers can create andimplement efficient lessons without using assessments?