Build
Make one group of 12 and one group of 3. Join them.
How many are there altogether?
Check: 12 + 3 = 15.
We Need More Time: Keep counting, pointing, or moving the objects. You may stop after counting and talk about what stayed the same.
Choose another view
- Draw it: Make marks, dots, shapes, or a quick picture.
- Say it: Tell a tiny story about 12, 3, and 15.
- Write it: Use numbers and an operation sign.
- Arrange it: Move the 15 objects into new groups without changing the total.
- Use a tool: Choose a number line, ten-frame, or calculator when it helps answer your question.
- Finish with this model: Keep the one way you showed 12 and 3. Another view is optional.
Choose a stretch
- Same total, new parts: Find another addition expression that equals 15, such as 10 + 5 or 8 + 7.
- Same total, subtraction: Start above 15 and remove some, such as 18 - 3.
- Same relationship, new context: Create a short story that matches one true expression.
- Make your own question: Change a number or condition and decide what you want to find.
- Finish here: Keep the model you made and move to reflection.
Compare
Place two views side by side.
- What is the same?
- What is different?
- Where do you see the 12, the 3, and the 15?
- Which view helps with the question you chose?
Reflection
- One connection I noticed was...
- One view I would use again is...
- One question I have now is...
- One change that made the problem more interesting was...
Finish Here moves directly to this optional Reflection without requiring Compare.
Where we left it
Choose the line that matches what you tried.
- We can stop here. Your materials can wait for another time.
- You joined the groups. We can leave it here.
- You showed 12 and 3 together. That's one way to make 15.
- You showed the same total in two ways. Point to the part you want me to notice.
You can come back another time.
