Domain

Measurement and Data

Cluster

Classify objects and count the number of objects in each category.

Standard(s)

NC.K.MD.3 Classify objects into given categories; count the numbers of objects in each category and sort the categories by count.

Materials

Pattern Blocks:  4 yellow hexagons, 5 red trapezoids and 5 blue parallelograms

Task

1.      Show the student the collection of cubes.

2.      Say: I have a set of blocks.  Sort these blocks for me.

3.      After the student has sorted the blocks, say:

·         How did you decide to sort the blocks?

·         Count the number of blocks in each group. 

·         How many blocks do you have in each group?

·         Do you have any groups that have the same amount?”

Continuum of Understanding

Not Yet Proficient

●       Is unable to sort the blocks in any way

●       Cannot count to determine how many blocks are in each group

Progressing

●       Can sort the blocks but is unable to provide an accurate count for some groups.

●       Does not notice that two groups have the same amount.

Meets Expectations

●       Sorts the blocks by color or shape and counts each group correctly.

●       Identifies that the sets of red shapes (trapezoids) and blue shapes (parallelograms) have the same amount