Not all roles available for this page.
Sign in to view assessments and invite other educators
Sign in using your existing Kendall Hunt account. If you don’t have one, create an educator account.
This Warm-up prompts students to compare four strings of numbers. To identify which 3 go together, students may use what they know about properties and kinds of numbers—factors and multiples, odd and even numbers, numbers in base-ten, and so on. It gives students a reason to use language precisely (MP6). It gives the teacher an opportunity to hear how students use terminology to talk about the characteristics of the items in comparison to each other.
In the discussion, it is important to talk about what the writer had to pay attention to when they designed this activity. This understanding will prepare students for a series of design activities that lead to an opportunity to create their own Which Three Go Together?
Which 3 go together?
The purpose of this activity is for students to use their knowledge of geometric figures or numbers in base-ten to complete a Which Three Go Together? If there is time, students can facilitate their Which Three Go Together? with another group.
Choose either the problem with geometric figures or numbers. Then complete the Which Three Go Together.
Geometric Figures
Which 3 go together?
Decide on a fourth figure to complete the Which Three Go Together.
For each group of 3 figures, discuss one reason why they go together.
Numbers
Which 3 go together?
Decide on a fourth number to complete the Which Three Go Together.
For each group of 3 numbers, discuss one reason why they go together.
The purpose of this activity is for students to use their knowledge of operations and expressions to complete a Which Three Go Together? with two unknown items. They work together to propose new expressions that share a feature with the other groups of 3 items.
Here is an incomplete Which Three Go Together. It has two missing expressions.
Which 3 go together?
Write 2 expressions to complete the Which Three Go Together.
For each group of 3 expressions, discuss one reason why they go together.
The purpose of this activity is for students to design their own Which Three Go Together? and describe the mathematical ideas they want others to notice in their 4 items. If students struggle to decide on a focus of their design, it may be helpful to give them a topic such as “properties of shapes” or “decimal fractions.”
Create your own Which Three Go Together? about any mathematical idea you want others to notice.
Which 3 go together?
A
B
C
D
“Today (or the past couple of days) you’ve used your mathematical understanding to complete and improve several Which Three Go Together? activities. You also have created an original Which Three Go Together?“
“What were the most important things about the 4 items you had to consider as you created your Which Three Go Together? Why were these things important?” (There was one group of 3 that didn’t go together, so I tried to make a change so they would go together. Each time I made a change, it created some other problem.)
“What did you pay attention to at the end that you hadn’t in the beginning?” (At first, I would try something to see if it worked, it was hard but fun to figure out. Sometimes I didn't realize that it didn't work, so it helped to get feedback from another group.)