This smartboard activity engages all students while they demonstrate their understanding of time signatures and rhythmic values. Each page contains a two measure rhythm passage in either 3/4 or 4/4 time, and is missing the last rhythm of the second measure. Students will choose a rhythm to complete the measure. Rhythms on each page include whole note and rest, half note and rest, dotted half note, quarter note and rest, and two eighth notes. Use white boards to keep everyone thinking throughout the activity and encourage students to discuss their thinking for an even more meaningful experience. After composing each passage, students can play them on unpitched percussion instruments.