T4T Equal Groups
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Task excerpt:
Domain 
Operations and Algebraic Thinking 
Cluster 
Work with equal groups. 
Standard(s) 
NC.2.OA.3 Determine whether a group of objects, within 20, has an odd or even number of members by: ● Pairing objects, then counting them by 2s. ● Determining whether objects can be placed into two equal groups. ● Writing an equation to express an even number as a sum of two equal addends. 
Materials 
Student sheet, pencil, manipulatives (counters, Unifix cubes, bears, etc.) 
Task 
This task can be given in whole group or small group. Teacher/students read aloud the problem and solve it. 
Continuum of Understanding 

Not Yet Proficient 
Needs prerequisite concepts ● Student is unable to show 12 objects shared equally. ● Student is unable to write an equation with two equal addends. ● Student is unable to determine if 12 is an even or odd number. 
Strategy (ies) used: ❏ Student uses pictures or numbers to show equal groups. ❏ Student pairs numbers to show equal groups. ❏ Student writes an equation to show that an even number has two equal addends. 
Progressing 
● Student writes that 12 is even number, draws 12 objects. Clearly shows that they can be equally grouped but the equation does not match student’s picture. ● Student writes that 12 is even, writes 6 + 6 for the equation but has the wrong sum or has the correct sum but wrong addends. 

Meets Expectation 
● Student writes that 12 is an even number, draws 12 objects and clearly shows that they can be equally grouped with six objects in each group and writes 6 + 6 = 12 for the equation. 