Keys for the Kingdom is a fully graded piano series designed especially for the Christian student. Each lesson is carefully written to provide gradual progress. While learning the basic concepts of piano playing, the student is introduced to many styles of sacred music: the wealth of great hymnody, songs, and psalms of the church as well as the great classics in piano literature that every student needs to excel in musical study. The Theory & Technique books provide students with workbooks to reinforce the theoretical concepts they are learning in the method books. Alongside these examples are exercises that help develop piano technique.