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U.S. Pop Music Timeline

c. 1775 British soldiers sing "Yankee Doodle" to mock colonists; Americans adopt it as their own tune…

Algebra: Completing the Square

Completing the Square Algebra Quadratic Equations and Inequalities Solving Quadratics by Factoring Completing the Square The Quadratic Formula All Signs Point to the Discriminant Solving One-…

Algebra: Sketching Line Graphs

Sketching Line Graphs Algebra Graphing Linear Equations Climb Aboard the Coordinate Plane Sketching Line Graphs It's a Slippery Slope Kinky Absolute Value Graphs Not that plotting points isn…

Chemistry: Equilibrium Constants

Equilibrium ConstantsChemistrySolution Chemistry/emical EquilibriaWhat Is an Equilibrium?Equilibrium ConstantsHeterogeneous EquilibriaDisturbing Equilibria: Le Chtelier's Principle All equilibria…

Theories of the Universe: Bang That Drum

Bang That DrumTheories of the UniverseScientific Origins of the UniverseBang That DrumA Big Bang AlternativeThe Accelerating UniversePlasma CosmologyThe Standard ModelThe Alpha and the OmegaIt's Out…

Easily Confused Words

allusion / illusion Allusion is a noun that means an indirect reference: “The speech made allusions to the final report.” Illusion is a noun that means a misconception: “The policy is designed to…

The Chinese Zodiac

The twelve animal signs of the Chinese calendar by Elizabeth Olson Related Links Chinese New Year Quiz Chinese New Year Traditions Quiz New! Chinese New Year…

Anatomy and
Physiology: Connecting with Synapses

Connecting with SynapsesAnatomy and PhysiologyThe Nervous SystemThe Great DivideSupport StaffNeuronsConnecting with SynapsesYou've Got Potential Synapses have all the fun. The axons and dendrites…