I prefer to teach in the workshop style format-- or the "three ring circus" as some call it! Many times, I will present a whole group lesson based upon grade level standards, then send students to their work space to work on indepedent work at their own level while I teach guided groups in reading, writing, word study, and math. Typically, science and social studies are whole group activities, as we are using discovery learning and conducting investigations in those content areas.