“One of the most difficult challenges teachers face is the issue of differentiation. Matching reading difficulty of texts and curriculum content with students' skills and knowledge is complicated and its benefits can be subtle” (T. Shanahan, What about cross-grade or cross-class grouping?) A New Form of the Joplin plan is called success. , and enjoyed great success. The basic idea is that these learning programs attempt to help each student reach the academic level. For example, a second grader who can read at a fourth grade level. The student in the example would cross grades for reading, but would be at the regular second grade level in all other grades. Grouping across grades is a remarkable learning strategy and can help students of all age groups learn to the best of their abilities.