Virginia Department of Education
Quadratic Equations
Review the multiple methods of solving quadratic equations through an analysis of the discriminant. Scholars use the discriminant to determine the best solution method and then solve various equations. As a challenge, learners build...
IPDAE
Themes in Short Stories
"What is the theme of this story?" The very question can spark fear in the minds of readers and incinerate confidence. Here you will discover an exercise that shows how writers use the tools of setting, plot, conflict, and...
Code.org
Practice PT - The Internet and Society
Speaking of the Internet. The culminating lesson for the unit on the Internet challenges pupils to prepare short, two-minute speeches on an issue facing society. The pupils chose from three topics that connect the Internet and...
Khan Academy
Khan Academy: Interpreting a Confidence Interval for a Mean
After we build a confidence interval for a mean, it's important to be able to interpret what the interval tells us about the population and what it doesn't tell us.
Khan Academy
Khan Academy: Interpreting a Z Interval for a Proportion
Once we build a confidence interval for a proportion, it's important to be able to interpret what the interval tells us about the population, and what it doesn't tell us. Let's look at few examples that demonstrate how to interpret a...
Khan Academy
Khan Academy: Reference: Conditions for Inference on a Proportion
When we want to carry out inferences on one proportion (build a confidence interval or do a significance test), the accuracy of our methods depend on a few conditions. Before doing the actual computations of the interval or test, it's...
Khan Academy
Khan Academy: Reference: Conditions for Inference on a Mean
When we want to carry out inference (build a confidence interval or do a significance test) on a mean, the accuracy of our methods depends on a few conditions. Before doing the actual computations of the interval or test, it's important...
University of Waterloo (Canada)
Computer Assisted Chem. Tutorial/chemistry of Batteries
A superb explanation of how a battery works. Discusses the associated chemistry which explains how a battery produces a voltage. Includes a series of "Confidence Building Questions."