Many aspects of responding to individual differences have always been part of the traditional class structure. Students should be treated as individuals in the quantity of work expected and in the quality. Research indicates that some students learn better by cognitive procedures while others learn better by conditioning drills. Some students may prefer oral work while others prefer written or visual materials. Some students may prefer to respond a great deal in class while others, who are learning equally well, are quieter. Some students prefer to participate in social exchanges while others prefer to study alone. Some students may well be expected to complete more work or longer assignments than others. Some students may well be put on their own while others should be given extra help. 4 Some students may demand more attention from the teacher than others. Some students need individual help while others manage very well in the group-conducted class. In homework assignments (which have always been self-paced) and on tests, the teacher should be conscious of including some work at a level appropriate for those students who need stimulation and challenge.