Students can grow together with the Flex-Trios series. Essential Elements Flex-Trios offers 20 carefully sequenced original works by Philip Sparke that adapt to your students' needs as solos, duets, or trios - any instrument pairing. With musicality and collaboration at the core, these trios support EE Book 1 or any other band method skills while inspiring students to listen more closely, work together, and take the next step as ensemble musicians. Just like method books, these trios are presented progressively, from simpler to more challenging.