Students explore the characteristics that distinguish living things from nonliving things. Students examine video clips and still photographs to gather evidence and develop criteria to decide if something is living or nonliving.

In this biology learning exercise, students answer 14 questions related to the skeletal system using an interactive crossword puzzle.

Students distinguish safe forms of radiation from those that are dangerous. Students watch a video about sources of radiation encountered every day. Students estimate their own annual radiation exposure.

Students investigate the origin of the modern periodic table of elements, and explore an interactive version that teaches them how to extract information from it.

Students watch a video segment and read text about the color of fireworks. Students watch a video segment and do an interactive activity on the mechanics of a firework.

Students watch a video segment on the engineering design process, then design a storage system for renewable energy. Students brainstorm and research ways in which renewable energies such as solar and wind power can be stored.

Pupils explore various types of electromagnetic waves, the range of the spectrum, and common sources of electromagnetic waves.

Students watch a video segment and read text about the color of fireworks. Students watch a video segment and do an interactive activity on the mechanics of a firework.

Students explore how DNA fits into chromosomes and how chromosomes relate to the human body. Students learn about DNA replication and protein synthesis and model these two processes.

Students explore how DNA fits into chromosomes and how chromosomes relate to the human body. They learn about DNA replication and protein synthesis and model these two processes in Web activities.

Students experience the forces of tension and compression by manipulating objects that are strong in each but not in both. Students construct a simple model of a beam bridge.

Students watch a video segment on the engineering design process, then design a storage system for renewable energy. Students brainstorm and research ways in which renewable energies such as solar and wind power can be stored.

Students watch a video segment on the engineering design process, then design a storage system for renewable energy. Students brainstorm and research ways in which renewable energies such as solar and wind power can be stored.

Middle schoolers distinguish safe forms of radiation from those that are dangerous. Students watch a video about sources of radiation encountered every day. Middle schoolers estimate their own annual radiation exposure.

Students watch a video segment and read text about the color of fireworks. Students watch a video segment and do an interactive activity on the mechanics of a firework.

Middle schoolers construct a variety of forms, test their strength, and discuss how tension and compression are distributed by triangles, arches, and domes.

Students use simple materials to design, build and test a model of a free standing structure used to support overhead road signs.

Pupils explore the forces of tension and compression by manipulating a variety of objects, and apply what they learned in the construction of a model bridge.

Students examine how vibrations are responsible for the sounds we hear. Students experience vibrations using several of their senses.

Students watch and predict chemical reactions when different substances are mixed together. They differentiate between solid, liquid, and gas.

Student designs a test that uses their sense of hearing to judge the effectiveness of different solids to transmit sound vibrations. Students experience vibrations using several of their senses.

Student learns about the life cycle of plants by watching a time-lapse video. This activity provides learners with further evidence that all living things grow and change as they progress through their life cycle.

High schoolers explore the structure of DNA and the process of DNA replication, describe the process of protein synthesis, recognize the importance of proteins in the human body, and look at how mutations affect protein synthesis.

First graders recognize that spiders are important natural predators. They work in small groups with simple field guides to identify as many of their spiders as they can.