This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 1 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [3:24]

This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 3 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [3:10]

This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 5 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [1:56]

This lesson shows how the Pythagorean Identity can be solved for the tangent function. It is 6 of 6 in the series titled "Solving a Pythagorean Identity for Tangent." [1:37]

Using the quadratic formula with terms that include trigonometric expressions is shown here. [3:03]

Solving an SAS by using the Law of Cosines is demonstrated here. This lesson is 1 of 6 in the series titled "Solving an SAS Triangle with the Law of Cosines." [3:22]

Watch this guided screencast, and learn how to figure the velocity of two objects after an inelastic collision. [5:40]

Students learn about the special product rule for Product of the Sum and Difference of Two Terms, which is useful for understanding polynomial identities. Includes short multiple-choice quiz. [3:30]

The video lesson provides proof of the Binomial Squared of a Difference special product rule, which is useful for understanding polynomial identities. Includes short multiple-choice quiz. [3:39]

Reviews the Binomial Square of a Sum special product rule, which is useful for understanding polynomial identities. Includes short multiple-choice quiz. [4:11]

This lesson discusses how and why plants and animals adapt to their surroundings over time. It is 3 of 4 in the series titled "Speciation and Natural Selection."

A slide show with three accompanying video lesson segments illustrating the difference between speed and velocity, and demonstrating how to calculate average speed and velocity. [6:31]

Using velocity and acceleration, learn how the speeding up or slowing down of an object is measured. [8:20]

Video demonstrating how to find the square root or the cube root of a fraction. Includes three multiple-choice questions for checking comprehension. [0:42]

This lesson offers reasons why some students prefer to read the text before reading the questions when asked to answer questions. It offers this information in text and audio formats.

This lesson explains the difference between static and kinetic friction. It is 1 of 2 in the series titled "Static & Kinetic Friction." [6:58]

Learn about the steps to take while performing the scientific method in an investigation. [1:31]

Notes, an animated video and a five-slide PowerPoint presentation explaining strong, active verbs and how students can use them in their writing. [1:25]

A lesson with audio over how to use strong verbs in writing. It is 1 of 5 in the series titled "Strong vs. Weak Verbs." [2:24]

Listen to this podcast introducing the function of enzymes in the human body. [0:38]