Mathalicious: Ad Vantage
Mathalicious

Students decompose irregular polygons into triangles and rectangles, find their areas to estimate the fraction of a scene that’s advertising, and discuss the pros and cons of living in an ad-free world.

youcubed: Triangle Designs (K-2)
youcubed (Stanford University)

Mathematics is a creative and visual subject!

Illuminations: Three Sides
Illuminations (National Council of Teachers of Mathematics)

In this lesson, students compare and contrast shapes using attribute blocks.

Illuminations: Tracing and Drawing
Illuminations (National Council of Teachers of Mathematics)

In this lesson, students continue to discuss attributes of triangles.

Illuminations: Geoboards
Illuminations (National Council of Teachers of Mathematics)

Students use appropriate vocabulary to describe shapes to their classmates.

Illuminations: Working with Shapes
Illuminations (National Council of Teachers of Mathematics)

Students review basic geometric terms related to triangles.

NRICH: Board Blocklive
NRICH (University of Cambridge)

Take it in turns to make a triangle on the pegboard. Can you block your opponent?

GeoGebra: Parallelograms - IM 6.1.4
GeoGebra

“Parallelograms” from IM Grade 6 by Open Up Resources and Illustrative Mathematics.

GeoGebra: From Parallelograms to Triangles - IM 6.1.7
GeoGebra

“From Parallelograms to Triangles” from IM Grade 6 by Open Up Resources and Illustrative Mathematics.

GeoGebra: Area of Triangles - IM 6.1.8
GeoGebra

“Area of Triangles” from IM Grade 6 by Open Up Resources and Illustrative Mathematics.

GeoGebra: Bases and Heights of Triangles - IM 6.1.10
GeoGebra

“Bases and Heights of Triangles” from IM Grade 6 by Open Up Resources and Illustrative Mathematics.

GeoGebra: Formula for the Area of a Triangle - IM 6.1.9
GeoGebra

“Formula for the Area of a Triangle” from IM Grade 6 by Open Up Resources and Illustrative Mathematics.