This set of twelve 1" cubes of polypropylene, brass, acrylic, oak, pine, rosewood, steel, aluminum, copper, dense wood (lignum vitae), nylon, and polyvinyl chloride (PVC) allows students to test the density of different materials. The set includes a Materials Density Table.

This kit engages students by allowing them to explore the concept of density. The kit also includes concepts such as buoyancy, intensive/extensive properties, and testing predictions. Instructions are included. Materials support 15 teams.

This poster explains how sound is produced, how sound travels, how we hear sound, and applications of sound.

Aluminum alloy tuning forks have exceptional tone duration and superior sound.

This instrument can be used to demonstrate sound and various pitches.

PK students shake the wooden cubes to hear each unique rattling sound and find its match, and guess the material that makes each corresponding sound. Look through the translucent colored acrylic on the base of each box for self-correction. Builds matching, concentration and perception skills.

Set of 6 high-quality acrylic prisms made from clear acrylic with all sides polished.

Using these six acrylic lenses, students can learn about optics, magnification, how telescopes and cameras work, and more. Comes in a storage box and with an activity guide. Includes the following 38-millimeter lenses: double convex, plano-convex, concavo-convex, double concave, plano-concave, and convexo-concave

Rectangular blocks are 90 mm x 63 mm x 17 mm and are designed for use as an index of refraction plate.

This self-contained unit allows students to measure and study refraction of light

This kit can be used to suspend magnets in midair to demonstrate that like poles repel. Flip the magnets to show that opposite poles attract.

A battery cell holder keeps a battery fixed in place safely and securely while conducting electrical energy from the battery.

A Van de Graaff generator is a device for making lots of static electricity. A favorite demonstration with the Van de Graaf is to make someone's hair stand on end.

Build five simple machines – pulley, wheel and axle, inclined plane, lever, and wedge – with this sturdy plastic set. Each machine is easy to assemble and take apart, so students can explore the different configurations and learn how they provide mechanical advantage. This kit includes 63 pieces and an assembly guide.

Set of 9 hooked masses constructed of cast iron with a black enamel finish. Each mass has a fixed hook on top and a recessed bottom with hanging bar to hang additional hooked masses. Includes 1,000-g; 500-g; two 200-g; 100-g; 50-g; two 20-g; and 10-g masses.

Spring scales provide direct readings for both force and mass measurement.

This is a fun tool to learn about velocity and acceleration. Launch marbles at five different speeds. The safety guide is printed directly on the marble launcher’s surface. A protractor is built into the launcher. It includes an experiment guide but no marbles.

The air puck soccer disk can be used to demonstrate Newton's Laws, energy, and momentum. The disk glides on a cushion of air for nearly frictionless motion across any smooth surface.

This constant velocity car provides a visible source of uniform speed. Students can quantify and graph their results, starting them on the road to a conceptual understanding of motion.

**Secondary schools only

This colorful, hands–on molecular model set brings basic principles of atomic structure and bonding to life and is perfect for chemistry demonstrations and practice.

Students can use iron filings to reveal the strength and the direction of the magnetic forces.  The most common uses of iron-filings are mixtures and solutions investigations, electromagnetism investigations, and chemistry experiments. 

(M)SDS - Iron, Metal

An evaporating dish is a piece of laboratory glassware used for the evaporation of solutions.

Developed in cooperation with Global Rivers Environmental Education Network (GREEN). This kit provides a simple and economical method of testing well water or naturally flowing water for 8 basic water quality parameters:

• Coliform screening; kit performs 3 tests

• Temperature; kit performs unlimited number of tests

• Turbidity; kit performs unlimited number of tests

• pH; kit performs 10 tests

• Dissolved oxygen; kit performs 10 tests

• Biochemical oxygen demand (BOD); kit performs 10 tests

• Nitrate; kit performs 10 tests

• Phosphate; kit performs 10 tests

Simple, illustrated, bilingual (English/Spanish) instructions ensure accurate results. Kit comes packed in screw-lid canister and includes liquid crystal thermometer, turbidity measuring scale, labware, and reagents.

This kit tests for pH using the Octa-Slide 2 Comparator. It covers a wide pH range from 3.0 - 10.5 pH.

Neutral litmus paper turns from purple to blue or red. Strips measure 7 x 48 mm.

Bromothymol blue is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH. A common use is for measuring the presence of carbonic acid in a liquid.

(M)SDS - Bromothymol Blue, 0.04%