In previous lessons, students worked with physical objects and images to determine if groups of objects were even or odd. They represented even numbers as an equation with two equal addends.
In this lesson, students continue to practice identifying and justifying even and odd numbers and deepen their number sense with numbers within 20. They notice patterns in even and odd numbers when counting and use what they know about 2 equal groups and pairs to generalize why adding 1 changes whether a group is even or odd, but adding 2 does not (MP8). Students add even and odd numbers and connect the mental strategies they use to add within 20 to patterns in the value of the sums of even and odd addends.
This lesson is optional because it goes beyond the depth of understanding required to address the standards.
- Recognize patterns in sums of odd and even numbers.
- Busquemos patrones que ocurren con números pares e impares.
Materials to Gather
Materials to Copy
- Presto Chango Recording Sheet, Spanish
Teacher Reflection Questions
- Target Numbers (1–5), Stage 7: Subtract Hundreds, Tens, or Ones (Supporting)
- Five in a Row: Addition and Subtraction (1–2), Stage 8: Add within 1,000 with Composing (Supporting)
- How Close? (1–5), Stage 4: Add to 1,000 (Supporting)
Print Formatted Materials
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|Student Task Statements
|Lesson Cover Page
|Teacher Presentation Materials