*Lower
Elementary* - Number

Title: What are the different combinations of red and
blue arms of the alien? The goal of this lesson is for students to use problem-solving
to identify the combinations to break apart ten and the patterns among
them. Detailed
Lesson Procedure.

*Lower
Elementary* - Number

Title: Seeing Numbers in Ones and Tens.

The goal of this lesson is for students to develop
understanding of the structure of 2-digit numbers as tens and ones
(place value understanding).

*Upper
Elementary* - Area

Title: Which Chocolate is the Biggest?

The goal of this lesson is for students to recognize
that rectangles that have the same area can have different perimeters
and that rectangles that have the same perimeter can have different
areas.

*Upper
Elementary* - Area

Title: Can You Find the Area?

The goal of this lesson is to use problem solving activities
to develop the concept of equivalent area transformation to use as
a basis for finding the formulas for the area of a parallelogram,
a triangle, and a trapezoid. Video description
- Can You Find the Area?

*Upper
Elementary* - Area

Title: Area of Complex Figures

The main goal of this lesson is for students to experience
composition and decomposition of figures in order to find the area.

*Upper
Elementary* - Geometry

Title: How many edges do I need to cut in order to open a cube?

The goal of this lesson is to deepen students' understanding of three-dimensional
geometric objects through problem-solving activities. Board
plan. Video - To Open
a Cube.

*Upper
Elementary* - Levers

Title: Can You Lift 100 kilograms?

The goal of this lesson is to enable students to investigate
the design and operation of levers by changing the position from which
effort is exerted and the amount of effort.

*Upper Elementary* - Pendulums

Title: The Secret of Trapezes.

In this set of lessons, the students investigate three
factors: the weight of the clay on the trapeze; the angle of release;
and the length of the wire.