ALEX Learning Activity

  

Array We Go!

A Learning Activity is a strategy a teacher chooses to actively engage students in learning a concept or skill using a digital tool/resource.

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  This learning activity provided by:  
Author: Chasity Parker
System:Russellville City
School:West Elementary School
  General Activity Information  
Activity ID: 2527
Title:
Array We Go!
Digital Tool/Resource:
Interactive Ten Frame/Array Work Mat
Web Address – URL:
Overview:

In this activity, the students will look at concrete representations, followed by pictorial representations of arrays. Students will write equations, using repeated addition, to determine the total number of objects in a rectangular array.   

This activity was created as a result of the ALEX Resource Development Summit.

  Associated Standards and Objectives  
Content Standard(s):
Mathematics
MA2015 (2016)
Grade: 2
4 ) Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends. [2-OA4]


Alabama Alternate Achievement Standards
AAS Standard:
M.AAS.2.4- Find the total number of objects in two equal groups (limit of twenty total objects).


Learning Objectives:

The students will determine the number of rows and columns of concrete and pictorial rectangular arrays (up to 5 rows and 5 columns.)   

The students will determine the total number of objects in rectangular arrays.

The students will write an addition equation to express the total number of objects in rectangular arrays. 

 

  Strategies, Preparations and Variations  
Phase:
During/Explore/Explain
Activity:

  1. Using concrete objects (linking cubes, color tiles, food, etc.), build a rectangular array with 2 rows and 5 columns.
  2. Ask students to think about the objects and what they see. Have students talk with a shoulder partner to answer questions such as:  "How many objects do you see?", "How many rows?", "How many columns?", "How many objects are in each row or column?"
  3. Have a few students share their conversations by answering the questions discussed with his/her partner.
  4. Remind students that objects in rows and columns are called "arrays". 
  5. To make the connection from the concrete array to pictorial, build the 2 x 5 array using the Interactive Tens Frame/Work Mat resource. 

    • Use the following steps to change the number of rows and/or columns on the work mat:

      • Click on the "rows" dropdown menu.  Change to 5.
      • Click on the "columns" dropdown menu.  Change to 5.
      • Choose a color, then click the "fill" button to fill in the array.

  6. The teacher will show students how to represent the objects using a repeated addition sentence. Ex. 5 + 5 = 10, 2 + 2 + 2 + 2 + 2 = 10. 
  7. Repeat steps 1 through 6, using different combinations of rows and columns (up to 5.)
  8. Give students the equation 2 + 2 + 2 and have them represent the array in a drawing.  
  9. The teacher will show what the drawing should look like using the Interactive Tens Frame/Array Work Mat.
  10. Allow students to compare and share drawings. Repeat with other equations. 
Assessment Strategies:

Quick/Formative Assessment:

Students will draw an array to match the following repeated addition equations.  The teacher will perform a quick assessment of drawings through observation to determine the next instructional steps or continue to mastery assessment. 

  1. 3 + 3 + 3 = 9
  2. 4 + 4 + 4 + 4 = 12

Students will write an equation to match the following arrays (displayed by the teacher using a drawing or Interactive Tens Frame/Work Mat.) The teacher will assess students' understanding through observation to determine the next instructional steps or continue to mastery assessment.   

  1. 5 rows and 4 columns
  2. 3 rows, 2 columns 

Students will complete the following for the assessment of mastery. 

Arrays Repeated Addition Assessment

 


Advanced Preparation:

Become familiar with the Interactive Tens Frame/Arrays Work Mat.  You can change the grid to format a 5 x 5 work mat, suitable for the content standard. (Instructions are included in the activity section) 

Gather the concrete items needed to build arrays.

Prepare the assessment equations and arrays. Print and copy the assessment handout.  

Variation Tips (optional):

Some students may need to use concrete representations longer than others.  It is important not to go straight to pictures before students are ready. 

Allow students to explore/locate arrays outside the classroom, or as a homework activity. 

Notes or Recommendations (optional):

ALCOS 2019

4. Using concrete and pictorial representations and repeated addition, determine the total number of objects in a rectangular array with up to 5 rows and up to 5 columns. 

a. Write the equation to express the total number of objects in a rectangular array with up to 5 rows and up to 5 columns as a sum of equal addends. (2OA.4)

  Keywords and Search Tags  
Keywords and Search Tags: arrays, columns, repeated addition, rows