## Reflection: ELL Students Presenting Polygons - Section 2: Polygon Vocabulary and Examples

When starting this unit, it's critical that students have a strong understanding of the vocabulary from the very beginning.  One technique to scaffold questions about regular and irregular polygons is to set-up a visual check-list like in Presenting Polygons Scaffolding Example. To the left of each question you'll see I have students make check boxes with symbols and notations.  Students use this to determine if the polygon meets both requirements, that all angles are congruent and all sides are congruent and is indeed regular.  If either of these requirements fail, then the shape is not regular. As an added benefit, using the check-list guides students to checking both requirements, and for standardized exams, helps students practice how to justify their work.

Another way to help students with the tricky vocabulary in this unit around polygon names can be seen in Presenting Polygon Helpful Vocab Hint.  For hexagon, I tell students that a hex is a curse and the number 6 when repeated is often used in literature for evil.  While decagon has the same prefix as decade, hence, this is a 10-sided figure.

ELL Students: Scaffolding and Vocab Tricks

# Presenting Polygons

Unit 6: Pretty Polygons
Lesson 1 of 8

## Big Idea: Tri, Quad, Pent, Hex ... learn the key vocabulary for polygon shapes and find interior angle measure for these pretty polygons!

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85 minutes

### Stephanie Conklin

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