Length of the Unused Bed (LUB) methods for scaling sorbers have confusing and complicated pedagogically elements. One method limits feeds to C/C[subscript F] < 0.3; a limitation not stated in the established textbooks. Discussed is a new LUB method with no limitation on the feed C/C[subscript F]. It fixes the pedagogically confusing and complicated elements while giving equivalent results. Also discussed: teaching module content, student outcomes, common student misconceptions, reduction-to-practice caveats, examples of class and homework problems.