In the previous lesson, students learned that an array is an arrangement of objects into rows with an equal number of objects in each row.
In this lesson, students refine their understanding of an array to include the fact that the objects in a row are equally spaced from each other. When arranged this way, the objects also line up into columns. Students use mathematical language to describe arrays and recognize that rows go side to side and columns go up and down (MP6). They use the structure of the array to find the total number of objects in an array (MP7).
Students should have access to counters throughout the lesson, including during the cool-down.
- Describe an array as an arrangement of objects into columns with an equal number of objects in each column.
- Let’s learn about columns in arrays.
Materials to Gather
- Each student needs 25 counters.
|Activity 1||15 min|
|Activity 2||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- Write Numbers (1–2), Stage 4: Skip Count by 2, 5, and 10 (Addressing)
- Target Numbers (1–5), Stage 7: Subtract Hundreds, Tens, or Ones (Supporting)