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Connect standard form and vertex form of a quadratic to an area model representation to see how negative values of h in the vertex form impact the visual and the standard form.

A Classroom Challenge (aka formative assessment lesson) is a classroom-ready lesson that supports formative assessment. The lesson’s approach first allows students to demonstrate their prior understandings and abilities in employing the mathematical practices, and then involves students in resolving their own difficulties and misconceptions through structured discussion.

3 Acts activity about the area of a sector.

This lesson unit is intended to help you assess how well students can:
Understand the concepts of length and area.
Use the concept of area in proving why two areas are or are not equal.
Construct their own examples and counterexamples to help justify or refute conjectures.

Videos that explore the relationship between the area of triangles formed by the diagonals of squares.

This task involves several different types of geometric knowledge and problem-solving: finding areas of sectors of circles (G-C.5), using trigonometric ratios to solve right triangles (G-SRT.8), and decomposing a complicated figure involving multiple circular arcs into parts whose areas can be found (MP.7). 

Website and video that uses sprinklers to model the area of circles in context.

In the Super Venn protocol, a team of teachers creates a large Venn diagram to show the overlap between an initial task, intended to assess student knowledge and skills at the beginning of a unit of study, and a final task, intended to assess student knowledge and skills at the end of a unit.

Task that models real world situations using spheres and cylinders.

Make connections between the structure of a shape and ways to efficiently count the number of objects within the shape.

Task that uses a cylinder to model a roll of toilet paper.

Activity that allows students to represent the area of a triangle as a part of the area of a rectangle.