Domain

Number and Operations in Base Ten

Clusters

Extend and recognize patterns in the counting sequence.

Understand place value.

Standards

NC.1.NBT.1 Count to 150, starting at any number less than 150.

NC.1.NBT.2 Understand that the two digits of a two-digit number represent amounts of tens and ones.

Materials

30 cubes or counters

Task

Place 30 cubes on the table in a scattered arrangement.  Ask: How many groups of tens do you think there are in this pile of cubes?  After student responds, say: Arrange this pile of cubes into groups of ten.

Once the student has grouped the cubes into groups of tens, ask: How many groups of ten are there?  Are there any cubes leftover?

Then, ask: How many cubes are there in all?  After the student states the amount, say: Count them to check.  Note if the student counts the cubes by ones (1, 2, 3, …), or if the student counts the cubes by tens (10, 20, 30).

Continuum of Understanding

Not Yet Proficient

Response includes 0-1 of the descriptors in “Meets Expectations”

q  Makes a guess at the total amount.

q  Uses the groupings to determine the amount. (e.g. “There are 3 groups. That means that there are 30 cubes.”)

Counts the cubes to determine the total amount by:

q  ones

q  tens

Progressing

Response includes 2-3 of the descriptors in “Meets Expectations”

Meets Expectations

Response includes all the descriptors in “Meets Expectations”

·         Places cubes into groups of ten correctly

·         Correctly identifies that there are 3 groups after the cubes are arranged

·         States a correct total amount

·         Counts the groups of cubes by ten