The Double Bubble Map is used for critical thinking and comparing & contrasting two people, places, things, or events. This map is vary similar to a Venn Diagram and you can even superimpose one upon completing a Double Bubble just for students to see the connection.
When using the Double Bubble Map, it is important to keep the points balanced. When contrasting, when there is a point for Item A, there should also be a point for Item B. These points (bubbles) will only touch the Item for which the student is referring.
The similarities of course will be connected to both Item A & Item B showing that that have this in common. These will be the center bubbles.
In order to keep students for concentrating on the physical appearance of the Double Bubble Map, have them start by comparing & contrasting without the bubbles. They can then go in and add them to complete the look. It can also be helpful to have students color coordinate the bubbles for those points that are similar vs. the points that show differences.
Example Double Bubble Maps:
Line Segment and Ray Double Bubble Map
Double Bubble Map Comparing 2 Three Digit Numbers
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