Howe Gelb curates a showcase of musicians to benefit music and art education in public schools at 7 p.m., Saturday, April 9. $21; $13 child age 13 or younger. Artists include Victoria Williams, Jason Lytle and Howe Gelb with Melted Wires (John Convertino, Jacob Valenzuela and Thøger Lund). $21; $13 child age 13 or younger. Call or visit rialtotheatre.com for tickets or more information.