In previous lessons, students partitioned circles and rectangles into halves, thirds, and fourths and identified an equal piece of different shapes as a half of, third, of, or fourth of the shape.
In this lesson, students continue to practice partitioning circles and describe halves, thirds, and quarters of circles using the language a half of, a third of, and a quarter of to describe a piece of the shape. They also use this language to describe the whole shape as a number of equal pieces. Students recognize that a whole shape can be described as 2 halves, 3 thirds, or 4 fourths. This understanding is the foundation for students' work with a whole and fraction equivalency in grade 3.
The activities encourage students to use quarters and a quarter of when describing fourths of a circle. This word choice is used to help students connect to the language used when telling time to the half and quarter hour in upcoming lessons.
- Describe two halves, three thirds, and four fourths as one whole.
- Use “half of,” “a third of,” and “a quarter of” to describe parts of a shape.
- Let’s talk about the whole.
Materials to Gather
|Activity 1||15 min|
|Activity 2||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
- How Are They the Same? (1–5), Stage 2: Grade 2 Shapes (Addressing)
- Which One? (K–5), Stage 3: Grade 2 Shapes (Addressing)