This lesson explains how to find the equation for an ellipse given its foci and vertices. It is 4 of 4 in the series titled "Finding The Equation For An Ellipse." [5:17]

This lesson derives the equation for a circle starting from the distance formula. It is 1 of 9 in the series titled "Finding the Equation of a Circle." [3:58]

This lesson derives the equation for a circle starting from the distance formula. It is 3 of 9 in the series titled "Finding the Equation of a Circle." [4:32]

This lesson shows how to find the initial point of a vector when the end point is known. It is 4 of 7 in the series titled "Finding the Initial Point of a Vector." [2:29]

This lesson shows how to find the initial point of a vector when the end point is known. It is 5 of 7 in the series titled "Finding the Initial Point of a Vector." [1:42]

In this lesson, students will learn how to find the inverse of a function's graph. [2:34]

This lesson will demonstrate finding the least-squares line. It is 4 of 4 in the series titled "Finding the Least-squares Line." [5:54]

This lesson will demonstrate finding the least-squares line. It is 1 of 3 in the series titled "Finding the Least-squares Line." [7:13]

This lesson demonstrates how to find the probability of two independent events occurring. It is 5 of 5 in the series titled "Finding the Probability of Two Independent Events." [4:07]

A short lesson explaining the "web of interactions" that occur in a food web. Understand how the energy flows between autotrophs and consumers. [0:35]

Through a combination of a slide show and a video lesson, learn all about forces. [1:56]

This screencast focuses on formal and informal language and when each is appropriate. It offers definitions and situational examples for each. [2:42] CCSS.ELA-Literacy.CCRA.SL.6. CCSS.ELA-Literacy.WHST.6-8.1.d

Created to teach students of the 21st century, SOPHIA is bringing the forms of energy straight to your fingertips. Become the commander of your own learning experiences as you take part in this energy tutorial. [4:00]

This lesson provides a timeline of fossils while also discussing the different types, locations, and geology of various fossils. [4:13]

In this video tutorial, explore whether a vertical or horizontal translation of a function is occurring. Assess learning with a quiz. [8:42]

This lesson introduces the future perfect tense and how it is used. It is 5 of 5 in the series titled "Future Perfect." [5:02]

This lesson goes over the formation of conditional in cases where the event is planned. This tutorial lesson shares a short screencast [2:51] with the lesson's content.

Through this video lesson, learn how to define gas pressure as the collisions of particles of a gas on the sides of its container. [7:08]

A narrated screencast which illustrates the relationship between the temperature and pressure of a fixed volume of gas. [4:46]

A video tutorial explaining the basics behind genetic engineering in the field of biotechnology. [4:09]