The Singer’s Edge Program Lesson Book Series: Level One – Foundations. The Singer’s EdgeTM Program was designed to teach popular singing styles in an innovative, fun, and practical way. It consists of 96 customizable lesson plans (skills), with over 100 online practice scales, guided by this corresponding lesson book series. It was designed for all ages, levels, and popular singing styles. Suggested Retail/List Price: $12.99. Member Price: $8.79.