3 Ways to Play! Musical 4 Corners is a fun activity for reviewing the different Bass Clef Notes with your music, band, orchestra, choir, or piano classes! PowerPoint Game, Easel Assessment, and Boom Cards are included, along with student answer sheets.The Boom Cards do not require a membership fee or student log-ins.These are a great option for those who prefer online activities.>>>Preview the Boom Cards here!<<<A favorite indoor recess game at my school is "4 Corners." I've m