This is a short video outlining the causes and effects of a magnitude 9.2 earthquake in Alaska in 1964. Additional resources include a background essay and discussion questions.

This brief video segment explores the question of sexual versus asexual reproduction through a discussion of a parthnogenic species of salamander.

In this video segment from Cyberchase, Matt and Inez have to choose a cage for Spout the Whale. The cages they find in a store come in different sizes and Matt and Inez are not sure of Spout?s exact size. They use estimation and non-standard measurements to estimate Spout's size and select the best cage. Teaching tips are also provided that discuss frame, focus and follow-up suggestions for using this video in a math lesson.

Lesson plan using a Cyberchase activity where students learn about body matches, measuring one part of the body using another body part. They learn about non-standard measures and relative measurement. This activity is motivated by a Cyberchase episode in which the CyberSquad must act as crime scene experts to find out who kidnapped Chewcrocca, a giant cybercrocodile.

In this video segment from Cyberchase, Harry plays a game of chess with a young friend and suggests a wager on the game. Harry?s friend uses a story to explain how putting a penny on the first square and then doubling the amount on each square of the chessboard can generate a tremendous amount of money over time. Teaching tips are also provided that discuss frame, focus and follow-up suggestions for using this video in a math lesson.

Video segment from Cyberchase, Harry decides he wants to compete in the Northern Hemisphere Games in New Orleans. He must compete in four events and score a total of 50 points to make the team. In each event, if he does well he can score high, but if he performs poorly, his score could become a negative number. Teaching tips are also provided that discuss frame, focus and follow-up suggestions for using this video in a math lesson.

n this activity, students learn some of the pitfalls of doing surveys. They also learn to examine the shape of data, including data clusters, the range and typical values. This Cyberchase activity is motivated by a video segment in which the CyberSquad searches for Hacker's castle based on a survey of where town residents have last seen him.

In this activity, Franklin goes to the store to purchase supplies to complete a painting job. He works with Laverne to estimate the cost of materials using rounding and uses that estimate to calculate his rate of pay based on how long the job takes him.

Lesson plan using a Cyberchase activity, students are introduced to a problem that gives them a sense of how quickly exponential growth accrues in the classic problem about a chess board and grains of rice. The context is extended to consider applications using money growth and chain letters. They are introduced to the algebraic representation for exponential growth.

This set of graphs from the Web site for the NOVA/FRONTLINE Special Report: "What's Up with the Weather?" reveals how atmospheric carbon dioxide, methane, and nitrous oxides from the burning of fossil fuels have climbed over time. The graphs show data collected during the study of ice core samples and are featured in the article "Stories in the Ice." Supplemental resources, including a background essay and discussion questions, are also provided.

This media-rich essay discusses astronomy's latest theories on the size and shape of the universe. Supplemental resources, including a background essay and discussion questions, are also provided.

Lesson plan using a Cyberchase activity where students learn about two-dimensional and three-dimensional shapes. Students watch a video clip and then identify the shapes that they see in the clip. In Assessment A, students are asked to identify shapes. In Assessment B, they have the opportunity to create a three-dimensional shape from a cutout.

This resource supports the English language development of English language learners.This animation from NASA illustrates the steps of the water cycle. Through the processes of condensation, precipitation, infiltration, runoff, transpiration, and evaporation, water continuously travels from the atmosphere to the ground and back again. The animation is available with an audio description- click on the right.

In this video segment from Cyberchase, the CyberSquad is trying to escape from a desert island by crossing a large body of water. They find a special lily pad that was left for them by the Red Warrior. When the lily pad is put in water it doubles and the number of lily pads keeps on doubling. The CyberSquad tries to use this doubling effect to help them create a lily pad bridge to cross the water and escape. Teaching tips are also provided that discuss frame, focus and follow-up suggestions for using this video in a math lesson.

In this video segment from Cyberchase, Bianca helps her friend make rock candy and discovers some interesting shapes. They also visit The Museum of and look at a variety of rocks and minerals, identifying and describing the many 2-D and 3-D shapes that are found in these specimens. Teaching tips are also provided that discuss frame, focus and follow-up suggestions for using this video in a math lesson.

In this video segment from Cyberchase, Bianca is getting ready to run in a race on a 200 meter track. She notices that the starting positions in the six lanes are at different points along the track. She believes this is unfair and sets out to measure the distance between the starting point and the finish line in both the outside and the inside lanes. Teaching tips are also provided that discuss frame, focus and follow-up suggestions for using this video in a math lesson.

This interactive periodic table shows the relationships among the elements and illustrates the electron configurations responsible for each element's chemical properties. In the "Mystery Elements" section, students identify and place unknown elements in their correct location on the table, based on their physical and reactive characteristics.

Lesson plan where students are asked to consider how to draw a perfect circle, and learn to do so using a line segment called a radius. They also learn to fold a circle in two directions symmetrically to find its center. This activity is motivated by a CYBERCHASE episode in which the CyberSquad set out to rescue a magic ring from Hacker and deposit it in a safe place.

This brief video excerpt, from Evolution: "Why Sex?", biologist Robert Vrijenhoek discusses the Red Queen hypothesis through the example of the Mexican Poeciliid fish. Vrijenhoek has been studying the Mexican Poeciliid fish for more than 30 years. Some species of Poeciliopsis reproduce sexually while others reproduce asexually. Vrijenhoek found that the genetic diversity produced by sexual reproduction allowed the sexual fish to survive a parasite more successfully than the asexual fish. Invoking the Red Queen hypothesis, Vrijenhoek suggests the sexual populations are able to keep up or adapt to new selective challenges, while the asexual populations, essentially clonal, are not. Supplemental resources, including a background essay and discussion questions, are also provided.

Lesson plan using a Cyberchase activity, students become more familiar and proficient at metric unit measurement by examining measurement and predictions concerning indoor tracks (200 m) and outdoor tracks (400 m). This CYBERCHASE activity is motivated by a Cyberchase For Real segment in which Bianca competes in her first track meet, but is not convinced that the staggered distances of the lanes on the indoor track are all the same distance.