The LessonBoard is a standard QWERTY keyboard with a color-coded by finger layout to show correct finger placement without letters printed on the keys. Compatible with Windows 98SE and newer, and MAC OS 10.1.5 and newer. The LessonBoard Pro is color-coded by zone to show correct finger placement on a computer keyboard. Now without letters printed on the keys, the "Pro" helps improve keyboard memorization, accuracy and speed, while requiring students to concentrate during testing. Plus, color-coding is known to help anyone who may have cognitive or physical differences that restrict learning.The LessonBoard is a standard QWERTY keyboard with a color-coded by finger layout to show correct finger placement without letters printed on the keys. Compatible with Windows 98SE and newer, and MAC OS 10.1.5 and newer. The LessonBoard Pro is color-coded by zone to show correct finger placement on a computer keyboard. Now without letters printed on the keys, the "Pro" helps improve keyboard memorization, accuracy and speed, while requiring students to concentrate during testing. Plus, color-coding is known to help anyone who may have cognitive or physical differences that restrict learning.