Hoping that a hands-on demonstration would help students grasp the concept, local teacher Rachel McKenzie reportedly instructed her class of 38 fourth-graders Wednesday to divide into two groups in order to simulate the conditions of an ideal class size. Now, I want everyone whose names begin with A through L to split off into a group that I could teach quite effectively, and everyone else to form a group that I could supervise easily without spending all day dealing with disciplinary issues, said McKenzie, urging the two groups to use their imaginations to pretend they were receiving the proper amount of individual attention.I know this is an unusual idea that may be hard to fully understand, but Id like everyone to try envisioning a class half our current size where Id be able to adequately identify student needs, monitor progress, and cover far more material during the year. At press time, McKenzie sent four children into the hall in order to reach the perfect simulated student-teacher ratio. 