This "tweet" inspired versatile exit slip is a great addition to upper level classrooms. Let students "show what they know" with two different forms; one has lines for written responses, while the other is blank for space to solve math problems or illustrate a concept.
The students can write their name @ the bottom, as well as #selfassess their knowledge. Was it #toohard or could they say #igotthis? All made #tomakeateacherslifeeasy