In this lesson designed to enhance literacy skills, students learn about the advantages and disadvantages of the two basic forms of reproduction for the living things that practice them.

In this video segment adapted from NOVA, learn about the critical role of flowers in seed plant reproductive biology.

In this video segment from NatureScene, discover some reptiles in the swamp forest ecosystem at Congaree Swamp National Park.

This interactive activity adapted from the Wisconsin Online Resource Center challenges you to plan, measure, and calculate the correct amount of roofing material needed to reroof a house.

In this video produced for Teachers' Domain, meet Sandra Bustamante, a university research assistant who started her career with a biotechnology certificate and is now using nanotechnology—rather than needles—to deliver vaccines.

In this video segment from Cyberchase, Jackie and Inez figure out how to break an Electro-Root into 2/5, one of the ingredients for the antidote to MotherboardŒë_í_Œ_ virus.

In this video segment from Cyberchase, Matt and Digit divide up the healing stone and discover equivalent fractions.

In this oral history from the Birmingham Civil Rights Institute, Frank Dukes describes his role in the 1962 boycott of discriminatory stores and businesses.

In this video segment adapted from the Massachusetts Institute of Technology, a team from the Mechanical Engineering Department studies snail movement for inspiration that may lead to new forms of robotic locomotion.

Featuring slow-motion footage of insects in flight, this video adapted from NOVA explores the engineering challenge of designing a robotic aerial vehicle that flies like a bug.

This video segment from IdahoPTV's D4K presents the types of rocks, how they are formed, what they are made of and how they are classified.

This interactive resource adapted from the National Park Service profiles rocky coast environments and describes how various geologic features form.

In this video segment from NOVA scienceNOW, meet researchers who are studying obesity and trying to understand the role that hormones and genetics can play in regulating appetite.

In this video adapted from the Encyclopedia of Physics Demonstrations, learn how plotting the changes in an object's position on a graph can provide information about the object's motion.

In this video from Science City, meet Romiya Glover, a chemist who develops products for HIV/AIDS testing. She describes the multidisciplinary nature of her job, how she decided to go into science, and how her work benefits others.

Learn how ravens benefit from sharing information and working together in this video segment from Nature.

Learn about root systems of trees in the Congaree Swamp National Park in this video segment from NatureScene.

Learn about rotational forces by watching astronaut Jeffrey Williams spin objects onboard the International Space Station in this interactive activity adapted from NASA.

This video segment from Nature takes viewers to a road race in Death Valley.

Astronomer Carl Sagan discusses the possibility of time travel in this audio-enhanced interview from the NOVAWeb site.