## Reflection: Rigor Partitioning Circles - Section 1: Introduction to New Material

In order for students to be successful in math, they need to be able to communicate using mathematical language - having vocabulary to explain concepts (i.e: halves, thirds, fourths, etc.) allows students to discuss concepts more fluently and even gain a deeper understanding of the concept (MP6)   While it may be tempting to start a lesson by "dumping" a lot of new vocabulary on students, that is oftentimes not engaging for children and does not lead to mastery or understanding of that vocabulary.  In this lesson, I try to help students build an understanding of a concept and then name it (i.e: we divide the circle into two pieces and then I introduce the word "half" to explain how we divided the circle).  Giving students a chance to experience a concept before giving them a lot of new vocabulary out of context generally allows them to internalize this new vocabulary faster and be able to more fluently and eloquently discuss the topic at hand.

Introducing background vocabulary
Rigor: Introducing background vocabulary

# Partitioning Circles

Unit 9: Partitioning Shapes
Lesson 7 of 8

## Big Idea: Students learn the vocabulary halves, thirds, fourths, fifths, and sixths and then work to divide circles into equal pieces.

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Standards:
Subject(s):
Math, Geometry, equal parts, partitioning shapes, circles, shapes
60 minutes

### Caitlin Vaughan

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