Institutions are structures of society that fulfill the needs of the society. Not only are they essential to the society's needs, they also help to build the society itself.

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 informative tutorial on Coulomb's Law and electric force in physics features a definition as well as formulas, diagrams, and learning exercises.

There are few ideas more sacred than the physical, emotional, and spiritual connections individuals have had with nature. The love of these beautiful landscapes has inspired countless generations to protect and preserve these lands and to make sure that the wild, untamed beauty will continue to awe future generations who have yet to come across their magnificence. On March 1, 1872, Yellowstone National Park was federally recognized as the countryåÕs first protected area, 44 years before the National Park Service was founded in 1916. And with this first step, the conservation, culture, history, and preservation of parks and protected areas began. Not only do these parks and protected areas ensure the vitality of natural resources, but of historical and cultural resources as well. Constructing and defining the National Park Service as the revered organization that it is today was no easy task. While some individuals have used their talents to create and preserve the physical landscapeåÑphysically building the parks and developing policies and lawsåÑothers have used their literary and artistic skills to showcase their beauty and history. No one person is the guardian or champion of these protected areasåÑwith collaboration, vision, and connection to the land, we are part of the parks equally as the parks are part of ourselves. Created by Clemson University Libraries.

Dasan and his mom attend their first Cub Scout camping trip with Pack 88 Providence. [5:36] Support materials for teachers and students are provided.

During a weekly visit, Maison and his dad ask and answer questions in a candid conversation about memories, feelings, their relationship, and incarceration. [4:49] Support materials for teachers and students are provided.

Tre and his dad have a discussion about his actions and their consequences during Tre's first visit to the Rhode Island Department of Corrections after some significant events in his life at home. [7:25] It provides support materials for teachers and students.

The Law of Cosines helps solve some triangle problems. This video explains several versions of the law of cosines and what they are used for. [9:22]

The Law of Sines helps with finding a missing side or angle measurement of a triangle. Watch this tutorial to learn about this proportion. [5:57]