Angelique Kidjo and Kerry Kennedy are the focal points of a lesson plan designed to shed light on inspirational women during Women's History Month. Scholars discuss and examine the lives of two women then showcase a woman in their lives...

How do you solve for an unknown angle? In this sixth installment of a 36-part series, young mathematicians use concepts learned in middle school geometry to set up and solve linear equations to find angle measures.

High schoolers study the ways in which an artist can use color. They view various images of artwork and discuss the effect of color on spacial dimensions, focal points, tone, and mood.

Explore outer space and decorate your classroom with an astronomy project. Learners create a visual model with the creation of a scaled solar system using different sized balls.

Can your physical science classes describe what happens when two objects collide? Whether they are new to the study of kinetic energy or just brushing up on their skills, pupils can observe the outcome of a variety of collisions...

Does where we live influence how our bodies express genetic traits? Explore variation in human skin color with an activity that incorporate video and hands-on learning. Individuals model the relationship between phenotypes and genotypes,...

How did free and enslaved blacks work to craft freedom for themselves and their families before the Civil War? Young historians read about the life of Thomas Day, a free black man who also owned slaves and had abolitionist ties in...

After reading Harriet Jacobs' Incidents in the Life of a Slave Girl, one of the most famous slave narratives of all time, learners imagine what it would have been like to experience the small dimensions of her hiding space. They then...

Where does bad light end up? In a prism! The presentation covers light, mirrors, lenses, and the structure of the eye. It also provides explanations of reflection, refraction, concave and convex mirrors and lenses, and a comparison of...

Good study tutorial about parabolas. There are examples of finding the equation of the parabola or the focal point and directrix that students can examine and attempt.

[Free Registration/Login Required] Change the focal point in this interactive concave lens to see how the focal length changes.After the activity, answer a challenge question to check for understanding.

[Free Registration/Login Required] Change the focal point in this interactive convex lens to see how the focal length changes. After the activity, answer a challenge question to check for understanding.

This lab is designed to have students investigate the relationship between the radius of curvature and the location of the focal point for a mirror like situation.

This is a 10-question quiz about thin lenses.

An app for investigating the operation of a refracting telescope. The location of the eyepiece and objective lens can be altered, and the focal point and path of light through the lenses can be observed.