Fifty years ago, when I was becoming a teacher, reading instruction consisted of a ubiquitous classroom practice: placing students in instructional groups according to their reading level. These groups were sometimes known by various colors or animals. I distinctly remember the redbirds, the bluebirds, and the buzzards among the most popular appellations. Today, although groups are now labeled with letters (Level G, Level L, etc.) and ornithological monikers are out of fashion, assigning stud...
