An animated video, with an accompanying quiz, explains how the circulatory system works.

A slideshow and a short quiz on simple machines and how they reduce the amount of work or effort needed to complete a task.

A video and a short multiple-choice quiz on the meaning of inertia.

A video and a short quiz on Newton's Third Law of Motion. It breaks down what action and reaction mean, and how mass and acceleration factor into the outcome of a collision.

A video and a short quiz on acceleration.

A slideshow and a short quiz on the different types of renewable energy sources.

A video and a short quiz on the properties of light.

A video and a short quiz on the basic concepts and vocabulary for understanding light energy.

A video and a short quiz on heat, covering its difference from temperature, thermal energy, and the means by which heat is transferred.

A video and a short multiple-choice quiz on the nitrogen cycle and how it works in an ecosystem.

A video and a short multiple-choice quiz on food webs that explains the difference between food webs and food chains, and the relationships that exist between organisms.

A slideshow and a short multiple-choice quiz on invertebrates that presents examples of each of the six phyla in the invertebrate group.

A slideshow and a short multiple-choice quiz on the group of invertebrates called arthropods, with examples of different kinds.

After viewing a video on fractions, test your knowledge with a quiz. This resource also offers related vocabulary for learners and a lesson plan and teacher guide for instructors.

Watch an animated video on the water cycle, become familiar with related vocabulary terms, and then quiz yourself on the parts of the water cycle, and review your answers when you're done. Site includes guidelines for a lesson entitled...

A video that explains the steps involved in the scientific method. Includes a karaoke song with lyrics, a quiz to test students' knowledge, and vocabulary definitions.

A video, a karaoke song to sing along to, and a 7-question multiple-choice quiz on the topic of photosynthesis.

A slideshow and a short multiple-choice quiz on the topic of severe storms, some types, and the damage that they cause.

A video and a short quiz on how sound travels in waves, its properties, and how to measure it.

A video, a karaoke song to sing along to, and a short quiz on strategies for solving a word problem in an organized way using algebraic thinking.

A video, a karaoke song to sing along to, and a short multiple-choice quiz on what happens during the rock cycle.

A video and a short multiple-choice quiz on the topic of animal adaptations, that look at physical and behavioral adaptations.

A video and a short multiple-choice quiz on food chains that explains how energy flows through the chain, beginning with plants.

A video and a short multiple-choice quiz on how the Earth's tilt on its axis, its rotation, and its orbit around the Sun give us a 24-hour day, a 365-day year, and our seasons.