Khan Academy
Khan Academy: X Linked Inheritance
Find out about the chromosomal basis of sex determination, X and Y chromosomes, and X-linkage.
Khan Academy
Khan Academy: Molecular Mechanism of Dna Replication
Learn the roles of DNA polymerases and other replication enzymes. Understand the leading and lagging strands and Okazaki fragments.
Khan Academy
Khan Academy: The Genetic Code
Learn how genetic code links groups of nucleotides in an mRNA to amino acids in a protein. Also learn about start codons, stop codons, and reading frame.
Khan Academy
Khan Academy: Intro to Viruses
Find out what a virus is, and learn about the structure of a virus and how it infects a cell.
Khan Academy
Khan Academy: Bacteriophages
Learn about bacteria-infecting viruses, including the lytic and lysogenic cycles.
Khan Academy
Khan Academy: Secondary Fronts of Wwi
Check your understanding of the course of WWI specifically in Serbia and Italy. This is a five question self-correcting quiz.
Khan Academy
Khan Academy: Eastern and Western Fronts of Wwi
Test your knowledge of the military strategy of the Eastern and Western fronts in WWI. This is a five question self-correcting quiz.
Khan Academy
Khan Academy: Wilson's War Message to Congress April 2, 1917
Read the full text of the speech Woodrow Wilson gave to Congress asking to declare war on Germany and enter WWI.
Khan Academy
Khan Academy: 1917 Speech by Senator Norris in Opposition to American Entry
Read the full text of the speech by Senator Norris explaining the reasons some of the population opposed declaring war on Germany and entering WWI.
Khan Academy
Khan Academy: Wwi Blockades and America
Test your knowledge of events leading to the U.S. declaring war on Germany. This is a five question self-correcting quiz.
Khan Academy
Khan Academy: Ancient Egypt, an Introduction
Get acquainted with Ancient Egypt through this overview that summarizes key characteristics of Ancient Egypt. A concise explanation of the dynasties, geography, and pharaohs are included. Research further using the bibliography and...
Khan Academy
Khan Academy: Egyptian Art
Art is usually meant to be seen and cherished, however, Egyptian art was never meant to be seen. The artwork in Egypt was to benefit the deceased. This site shows examples of Egyptian art and details the main characteristics of their...
Khan Academy
Khan Academy: Materials and Techniques
Ancient Egyptians used a wide variety of techniques to make their unparalleled artwork. Stone, paint, wood, metal, relief sculpture, and pigments are described with pictures. A question/answer section from the community is also included.
Khan Academy
Khan Academy: Palette of King Narmer
The Palette of King Narmer is so precious it is never allowed to leave the country. This source brings it into your classroom in the form of vibrant pictures and descriptions. The different theories about what the pictures on the palette...
Khan Academy
Khan Academy: The Great Pyramids of Giza
The great pyramids at Giza are one of the Seven Wonders of the ancient world. Learn the role the sun played in the construction of the pyramids. Included is a map of where the pyramids are located in Giza, a bibliography for further...
Khan Academy
Khan Academy: Old Kingdom: Pyramid of Khufu
Using vibrant pictures, this source details the construction of the Great Pyramid for the Pharoah Khufu. A bibliography is given for further research and a question/answer section from the community is included.
Khan Academy
Khan Academy: American Indian Culture of the Southeast
The Southeast Indian tribes were known for their agricultural success. Examine their farming practices, pottery, mound building traditions, and societal structure in the following summary. Also included are pictures, maps, critical...
Khan Academy
Khan Academy: American Indian Culture of the Plains
The Plains Indians had a dynamic society that changed over time. See how the introduction of the horse changed their way of life. Read about their religion, societal structure, housing, and tools. Included are pictures, maps, critical...
Khan Academy
Khan Academy: Probability: The Basics
Provides an introduction to probability. Includes examples, two videos, and links to additional resources, e.g., exercises to try. There are also problems and discussions of them in the Comments section.
Khan Academy
Khan Academy: The Election of 1968
Richard Nixon was elected president during a tumultuous year in American history. Examine his campaign through this summary, references for further reading, questions for analysis, and a question/answer section from the community.
Khan Academy
Khan Academy: The Vietnam War
Examine the Vietnam War through this summary, the transcript of the Gulf of Tonkin Resolution, questions for analysis, references for further reading, and a question/answer section from the community.
Khan Academy
Khan Academy: Lyndon Johnson as President
Lyndon Baines Johnson became president on the heels of a national tragedy. Review his domestic and foreign policy using the following summary, questions for critical thinking, references for further study, and a question/answer section...
Khan Academy
Khan Academy: The Cuban Missile Crisis
In October 1962, Americans "peered into the abyss of nuclear destruction". Investigate how America got this close to nuclear war by reading the following summary, answering critical thinking questions, using the bibliography for further...
Khan Academy
Khan Academy: The Student Movement and the Antiwar Movement
The 1960's was a time of upheaval in America mainly led by young adults disenchanted with the government. Examine the influences of this movement and read an excerpt from the Port Huron Statement written by the SDS at the University of...