LearningUkulele.com—Learning Ukulele with Curt is the product of Curt Sheller and Curt Sheller Publications, Funky Frets Music Store, and a few trusted advisers. Curt Sheller, your Ukulele Kumu, has been playing ukulele over 20 (since 2003) years and has over 30+ years of teaching experience, written over 50 books, almost 40 for ukulele.