**Four Corners- Who’s Correct?**- Four Corners is a great informal assessment tool. Choose a problem centered around the skill on which you are currently working. Show four different solutions to the problem, each labeled with a fictitious student’s name. Ask students to complete the problem themselves. Once all students have completed the problem, have them go to the corner of the room for the student whose response they believe to be correct. After all of the students are in place, in turn, ask them to justify why their person is correct. As students listen to the justifications, they should be able to determine the correct response, if not, have the groups discuss why they believe the other responses are incorrect.

**Example:**

Three students
are working on this problem after school at the YMCA:

6 + 3[(4 + 5) – 1] + (12 ÷ 6)

Each student
recorded a different answer for the first step.

**Who is correct?****Marco:**9[(4 + 5) – 1] + (12 ÷ 6)

**Dominique:**6 + 3[(4 + 5) – 1] + (2)

**Alex:**6 + 3[9 – 1] + (12 ÷ 6)

**Sharon:**6 + [(12+ 5) – 1] + (12 ÷ 6)