This page provides a basic overview of checks and balances and what each branch can do to check the other.

The principle of checks and balances prevents one branch of government from becoming too powerful. Examples of checks and balances include vetoing of bill, ratifying treating, judicial review and others. This lesson provides video clips with examples and explanations of checks and balances.

Prerequisite: Students need to know the function of each of the branches of government. In this activity, students examine documents from U.S. history to examples of specific "checks and balances."

In this activity students will analyze documents that span the course of American history to see examples of "checks and balances" between the legislative, executive, and judicial branches in action. Students will then match the documents they have examined with an appropriate description of the branches of government involved in the action.

John Armstrong, Weber State University answers the question: How do cheesemakers use physics to cut and grade cheese?

Two clear liquids are mixed together and the audience is told to watch closely... "Don't take your eyes off the liquid or you'll miss it!" Then, in a flash, the water changes to ink (or so they think!). Clock reactions like this never fail to capture the students attention, and the Iodine Clock Reaction is one of the most startling chemical demonstrations you'll ever see. How did that happen? is almost always the reaction, and when students ask How?, theyre ready to learn.

In this video produced for Teachers' Domain, learn about MIT professor Cathy Drennan's research into microorganisms that remove carbon dioxide, a greenhouse gas, from the atmosphere.

Chemistry is designed to meet the scope and sequence requirements of the two-semester general chemistry course. The textbook provides an important opportunity for students to learn the core concepts of chemistry and understand how those concepts apply to their lives and the world around them. The book also includes a number of innovative features, including interactive exercises and real-world applications, designed to enhance student learning.

Chemistry: Atoms First is a peer-reviewed, openly licensed introductory textbook produced through a collaborative publishing partnership between OpenStax and the University of Connecticut and UConn Undergraduate Student Government Association.

This title is an adaptation of the OpenStax Chemistry text and covers scope and sequence requirements of the two-semester general chemistry course. Reordered to fit an atoms first approach, this title introduces atomic and molecular structure much earlier than the traditional approach, delaying the introduction of more abstract material so students have time to acclimate to the study of chemistry. Chemistry: Atoms First also provides a basis for understanding the application of quantitative principles to the chemistry that underlies the entire course.

Learn the basics of gas with this informative video. Gases are compressible, they diffuse and expand to occupy the volume of their container fully.

A work in progress, CK-12 Chemistry Teacher's Edition supports its Chemistry book covering: Matter; Atomic Structure; The Elements; Stoichiometry; Chemical Kinetics; Physical States of Matter; Thermodynamics; Nuclear and Organic Chemistry.

The Cherokee Nation virtual field trip affords an in-depth look at the lives of the Cherokee Indians, from their first encounters with Europeans to events, such as the Gold Rush and the signing of the Indian Removal Act by Andrew Jackson, that led to their forced relocation to Indian Territory in 1838.

This problem includes a percent increase in one part with a percent decrease in the remaining and asks students to find the overall percent change. The problem may be solved using proportions or by reasoning through the computations or writing a set of equations.

Mission US is a role-playing game (RPG). In each mission you’ll step into the shoes of a young person during an important time period in US history. While your character and many of the characters in the game are fictional, they are based on the experiences of real people. (You will also encounter some actual historical figures and witness historical events in the game!) In this simularion, the year is 1866. You are Little Fox, a Northern Cheyenne boy. Can you help your tribe survive life on the Plains? Note: This game requires creating a free account login.

This resource includes the sheet music, activity instructions, and audio files for "Chicka Hanka" from the Elementary Songbook.

This resource is a free, downloadable audio file of short music clips to use for instruction.

This resource is a free, downloadable audio file of short music clips to use for instruction.