Sharon talks about the basic concept of her Bluegrass Mandolin Fingerboard Method, which teaches intermediate bluegrass mandolin players how to walk into jam sessions and play solos to any bluegrass song in any key. The method uses shapes and patterns that you may already be familiar with, but Sharon shows you how to use those patterns (chords, scales, and double stops) in different places on the neck and construct melody-based solos from them. She starts by explaining “the L shape,” a concept Sharon got from mandolinist John Moore that gives visual representation to the roots of the I, IV, and V chords on the fingerboard.