Video lecture focuses on light-dependent reactions and how they work. It shows how light energy can excite electrons which can be used to create ATP and NADPH. [9:04]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

A screencast lesson defining a conclusion and discussing how to write an effective conclusion. Students learn the traditional conclusion format as well as other formats that may better fit a writer's topic and purpose. Includes a section on styles of conclusions and a downloadable handout on conclusion strategies. [9:55] W.9-10.2f Conclusion, W.11-12.2f Conclusion. Common Issues with Conclusions CCSS.ELA-Literacy.WHST.6-8.1.e

This interactive, scaffolded activity allows students to build an atom within the framework of a newer orbital model. It opens with an explanation of why the Bohr model is incorrect and provides an analogy for understanding orbitals that is simple enough for grades 8-9. As the activity progresses, students build atoms and ions by adding or removing protons, electrons, and neutrons. As changes are made, the model displays the atomic number, net charge, and isotope symbol. Try the "Add an Electron" page to build electrons around a boron nucleus and see how electrons align from lower-to-higher energy. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology. The Concord Consortium develops deeply digital learning innovations for science, mathematics, and engineering. The models are all freely accessible. Users may register for additional free access to capture data and store student work products.

This interactive activity helps learners visualize the role of electrons in the formation of ionic and covalent chemical bonds. Students explore different types of chemical bonds by first viewing a single hydrogen atom in an electric field model. Next, students use sliders to change the electronegativity between two atoms -- a model to help them understand why some atoms are attracted. Finally, students experiment in making their own models: non-polar covalent, polar covalent, and ionic bonds. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology.

This concept-building module contains a variety of simulations for exploring factors that cause molecules to attract each other. It was developed to help secondary students understand both polar and non-polar covalent bonding. Users can manipulate models to see how the strength of attraction is affected by distance from one molecule to another, by heating the substance, and by mixing polar and non-polar substances. Part II of the activity is devoted to hydrogen bonds, and explores why water is one of the most important molecules for life's existence. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology.

In this interactive activity, learners explore factors that cause atoms to form (or break) bonds with each other. The first simulation depicts a box containing 12 identical atoms. Using a slider to add heat, students can see the influence of temperature on formation of diatomic bonds. Simulations #2 and #3 introduce learners to reactions involving two types of atoms. Which atom forms a diatomic molecule more easily, and why? The activity concludes as students explore paired atoms (molecules). In this simulation they compare the amount of energy needed to break the molecular bonds to the energy needed to form the bonds. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology.

In this interactive activity, learners build computer models of atoms by adding or removing electrons, protons, and neutrons. It presents the orbital model of an atom: a nucleus consisting of protons and neutrons with electrons surrounding it in regions of high probability called orbitals. Guided tasks are provided, such as constructing a lithium atom and a carbon-12 atom in the fewest possible steps. The activity concludes with a model for building a charged hydrogen atom (an ion). Within each task, students take snapshots of their work product and answer probative questions. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology.

This lesson plan deals with conditional probability and the probability of simultaneous events. Problems included in this lesson tend to have solutions that are counterintuitive. This presents an opportunity to investigate more deeply the mathematical and probability concepts involved. Many resources are available to teachers and students at this website.

Improve your digital collaboration and communication skills using online tools. Time to complete: 45-90 minutes

The definitions and comparisons between Local Area Networks (LANs), and Wide Area Networks (WANs).

What are some of the consequences of unemployment, both socially and otherwise? Students will get the answer to this question in the short module, Consequences of Unemployment. This content from Econ Lowdown also features alignment to national Financial Literacy and/or Economics standards.

This interactive classroom activity engages students with food conservation during the World War I by using primary source material from the World War I in Ohio Collection on Ohio Memory. This packet includes three activities using war posters, a newspaper bulletin, and rationing calendar with supplemental materials.

How angular momentum is conserved within a system when there is no external torque. [7:16]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This site is from the Physics Department at Georgia State University. The conservation of energy as a fundamental conservation law is presented and compared to other conservation laws (momentum and angular momentum). Links to further information are provided.

The delegates at the 1787 Convention faced a challenge as arduous as those who worked throughout the 1780s to initiate reforms to the American political system. In this unit, students will examine the roles that key American founders played in creating the Constitution, and the challenges they faced in the process.

Sal uses a protractor to create 10 degrees and 155 degrees angles. [2:41]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Find out how to solve a word problem by constructing a numerical expression. [1:21]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Sal Khan breaks down how to create the probability distribution of the number of "heads" after 3 flips of a fair coin. [6:47]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Students learn how the theory that explains the position of Earth's continents was established and later modified.

How does the shape of a cam affect the motion of a mechanism or machine? Explore the types of cam and follower mechanisms to identify how they transfer motion in machines. Engineering a mechanical device involves designing with a result in mind. This challenge will ask students to explore math, science and engineering design through the device of cam and follower.

This is a 4-hour lesson that includes a self-paced interactive module and classroom activities. The teacher guide includes a challenge sequence (timeline), relevance to standards, materials list, assessment, evaluation rubric, and learning extensions.

Lesson objectives: (1) Identify types of cam and follower and how they are connected to levers and mechanisms. (2) Differentiate the shapes of cams and the movement created. (3) Design, build and demonstrate your cam and follower mechanism.