Venn Diagram Warm-Up
A shower curtain can be bought to make this warm-up activity a permanent area in your classroom.
- Sticky notes (1 per student)
- Index cards (one per set)
Step 1: Depending on the grade level and the ability of your students, make a two or three set Venn diagram using a compass (before class). Make sure that the circles (and the intersections) are large enough to fit plenty of sticky notes. This can be displayed on the board, or on a permanent area in the classroom.
Label the sets: contains no parallel lines, contains at least 1 pair of perpendicular lines, and contains arcs.
Then, distribute sticky notes such that every student has one at their desk.
Step 3: Give students something to write on their sticky note, such as their first name. The way in which students write their names will give interesting results. For example, JANE has parallel lines, but Jane does not. Have students place their sticky note in the appropriate spot. Give a time limit of 2 minutes.
Step 4: With a timer set on 3 minutes, allow students to justify their placement (for example, depending on how a student writes their “J”, it may contain perpendicular lines) until the timer runs out.
How could you modify this warm-up to suit your classroom?