standard_description: Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.
problem_activity: Task
The teacher will need a 100 chart or large number line and a pointer.
As a whole group, have students chant the counting sequence starting with one to thirty, using the pointer to follow the number sequence.  Over time, increase the range to one to fifty and then one to one hundred. Eventually have a student take over the job of pointing out the numbers in the sequence.  Highlight the multiples of ten using a marker or a colored screen and have students chant the counting sequence by 10s.   This should be done daily.


aligns: no