CK-12 Foundation
Finding the nth Term Given the Common Ratio and the First Term: Dominoes
Topple misunderstandings of geometric sequences. Using a context of creating ever-increasing sizes of dominoes, pupils develop a geometric sequence. The scenario provides the size of the first domino and the common ratio between...
TED-Ed
History vs. Vladimir Lenin
Vladimir Lenin is on trial in an engaging, animated video where the merits and consequences of the formation of the Soviet Union and Lenin's actions are reviewed. This is a great way to illustrate how to establish and argue unique...
American Museum of Natural History
Tornadoes Spinning Thunderstorms
Tornado winds can reach more than 200 miles per hour. Learners explore wind speeds and more characteristics of tornadoes with an online lesson. They learn how tornadoes form and how scientists attempt to predict them. Can be used as an...