Teaching notes for parents and teachers
How to teach it
Model making ten with two addends, then add the third. Mark each original addend as it is used.
Example to work through together
Use the model below as you explain the example. Have your student point to the quantities as you discuss them.
6 + 3 + 4 = (6 + 4) + 3 = 10 + 3 = 13. Check that all three original addends were used once.
Ask your student
Which pair would make this addition easier?
If your student needs help
If an addend is lost or repeated, use three separate groups of counters and combine them visibly.