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In this math lesson, learners count and compare amounts of money less than or equal to one dollar.

In this activity (posted on March 27, 2011), learners follow the steps to construct a mini zoetrope, a device that produces an illusion of action from a rapid succession of static pictures.

In this two-part activity, learners investigate buoyancy, density and surface area as well as biodiversity and the relationship between the structure and function of organisms.

In this activity, learners investigate color vision as well as plan and conduct their own experiments.

In this math lesson, learners participate in a variety of activities that give them experience in recognizing, describing, and extending repeating and arithmetic patterns.

Learners will follow a specific process to make their own paper using scrap paper, newspaper, or junk mail.

In this design challenge, learners will engineer a structure and see if it can survive an earthquake they create.

In this activity, learners build cars using syringes and water-powered hydraulics. Learners construct the car frame out of cardboard and set up a hydraulic system to raise and lower the car.

Learners make their own paper using old newspaper. Learners can make their paper colorful by adding construction paper.

This activity (on pages 13-18) has learners build a model tree and then figure out how to make their tree stand up by itself.

Make a one-string "guitar" by stringing a cup with some fishing line. You amplify the plucking of the string by placing a piezo contact microphone and mini battery powered amplifier inside the cup.

Somatic Cell Nuclear Transfer (SCNT) is a cloning method that involves transferring a nucleus from a somatic cell of the individual to be cloned to an enucleated egg.

In this activity, learners build a machine made of craft sticks to multiply the levering motion of their hands and create a device that bends and extends.

In this activity, learners create 3D geometric shapes using straws and pipe cleaners.

In this math activity, learners read "The Button Box" by Margarette S. Reid and then make their own button boxes filled with different buttons.

In this activity, learners build a paper stellated rhombic dodecahedron, a three-dimensional 12-pointed star.

Learners use shop tools and various materials to construct a magnetic spinner and a compass.

In this math lesson, learners are introduced to proportional reasoning through modeling, sharing, and questioning techniques.

In this technology activity, learners light up the room with electrifying play dough creations. Learners use conductive and insulating homemade play dough to build simple circuits.

In this activity, learners explore how voting systems have changed with engineering advances over time. Learners work in teams to design their own voting system using easy to find materials.