Unit 8, Lesson 8
Contemos columnas y objetos en columnas
Grado 2
Preparation
Lesson Narrative
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 each row start in the same place and 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.
- Representation
None
- Comprehend (in spoken and written language) the term “column” refers to objects arranged up and down in an array.
- Create arrays and describe (orally) the “rows” and “columns” of arrays.
- Aprendamos sobre las columnas de los arreglos.
Required Preparation
- Each student needs 25 counters.
Teacher Reflection Questions
Outside of class, how can you reinforce the array work done today? Are there opportunities at other times during the day to ask students to represent or count objects using an array?