Molecular Workbench is a FREE and OPEN SOURCE, downloadable software utilizing Visual, Interactive Simulations for Teaching & Learning Science.
A typical MW module is a comprehensive learning package consisting of a series of scaffolded pages that contain text, simulations, tools, controls, graphs, navigation links, and embedded assessments. The user interfaces of simulations in MW can be customized for students of different levels (grades 6-16). This unique feature enables it to support a wide range of instructional strategies such as inquiry-based, discovery-based, and problem-based learning. (For Windows, OSX. Must have Java)

Students will predict bond polarity using electron negativity values; indicate polarity with a polar arrow or partial charges; rank bonds in order of polarity; and predict molecular polarity using bond polarity and molecular shape.

Explore molecule shapes by building molecules in 3D! How does molecule shape change with different numbers of bonds and electron pairs? Find out by adding single, double or triple bonds and lone pairs to the central atom. Then, compare the model to real molecules!

Explore molecule shapes by building molecules in 3D! Find out how a molecule's shape changes as you add atoms to a molecule.

A fun lab experience with little extra prep or materials needed. Kids are amazed that 1+1 doesn't equal 2!

Students work as engineers to learn about the properties of molecules and how they move in 3D space through the use of LEGO MINDSTORMS(TM) NXT robotics. They design and build molecular models and use different robotic sensors to control the movement of the molecular simulations. Students learn about the size of atoms, Newman projections, and the relationship of energy and strain on atoms. This unique modular modeling activity is especially helpful in providing students with a spatial and tactile understanding of how molecules behave.

Do you ever wonder how a greenhouse gas affects the climate, or why the ozone layer is important? Use the sim to explore how light interacts with molecules in our atmosphere.

This 4-lesson unit assumes student understanding of multiplication; it uses patterns, properties of the operation, and games to develop fact fluency. The unit included student recording sheets, questions for students and teachers, links to online applets, and suggestions for assessment and extension.

Students decompose 2-digit numbers, model area representations using the distributive property and partial product arrays, and align paper-and-pencil calculations with the arrays. The lessons provide conceptual understanding of what occurs in a 2-digit multiplication problem. Partial product models serve as transitions to understanding the standard multiplication algorithm.

Build your own system of heavenly bodies and watch the gravitational ballet. With this orbit simulator, you can set initial positions, velocities, and masses of 2, 3, or 4 bodies, and then see them orbit each other.

This is a guided inquiry investigation for students to determine the state of matter of a mystery material and to make potential real world applications/products for the mystery material.

This activity is an investigation of a "mystery material" where students have to determine whether the substance is a solid or a liquid. This activity can be done as part of an earth science or chemistry lesson.

In this classroom guided inquiry lesson, students will complete a serious of tests using five different mystery powders. Student will develop hypotheses, make observations, and draw conclusions about what each powder is and the physical and chemical reactions that occur when heat, water, iodine, and vinegar are added to each substance.

This two-hour special from PBS discussed atoms and elements, including the development and use of the periodic table of the elements.  Periodic Table discussion begins around the 32:00 mark and includes Theo Gray, author of The Elements.  Appropriate and meaningful modern supplement to chemistry classrooms.

This course focuses on the latest scientific developments and discoveries in the field of nanomechanics, the study of forces and motion on extremely tiny (10-9 m) areas of synthetic and biological materials and structures. At this level, mechanical properties are intimately related to chemistry, physics, and quantum mechanics. Most lectures will consist of a theoretical component that will then be compared to recent experimental data (case studies) in the literature. The course begins with a series of introductory lectures that describes the normal and lateral forces acting at the atomic scale. The following discussions include experimental techniques in high resolution force spectroscopy, atomistic aspects of adhesion, nanoindentation, molecular details of fracture, chemical force microscopy, elasticity of single macromolecular chains, intermolecular interactions in polymers, dynamic force spectroscopy, biomolecular bond strength measurements, and molecular motors.

This video is one of a series produced by the Switch Energy project. It reviews the pros and cons of natural gas as a source of energy.

This homework problem introduces students to Marcellus shale natural gas and how an unconventional reservoir rock can become an attractive hydrocarbon target. It is designed to expand students' understanding of hydrocarbon resources by introducing an unconventional natural gas play. Students explore the technological factors that make conventional source rocks attractive reservoir rocks and how this advance impacts both U.S. energy supply and the environment.

Produce light by bombarding atoms with electrons. See how the characteristic spectra of different elements are produced, and configure your own element's energy states to produce light of different colors.

In this lesson designed to enhance literacy skills, an early astronaut's experiences teach students that Newton's third law of motion—for every action, there is an equal and opposite reaction—applies both on Earth and in outer space.

Molecular Workbench (MW) is powerful, award-winning software that provides visual, interactive computational experiments for teaching and learning science. These simulations are HTML5 and work well on non-java based platforms.