Image-maker Alexander Tsiaras shares a powerful medical visualization, showing human development from conception to birth and beyond. (Some graphic images.)

It's your first day at Magnificent Marigold's Magical Macademy. But before you can learn your first spell you must get through the sorting ceremony. And the sorting hat has chosen you for a special challenge. The Macademy had 8 founders...

You’ve been accused of a crime you did not commit. It’s impossible to prove your innocence. If you insist that you’re innocent anyway, you’ll likely be found guilty and executed. But if you confess, apologize, and implicate others,...

Over the years, lots of explanations have been proposed as the origin of Stonehenge, including lost technologies, outright magic, and — of course — aliens. What do we actually know about this prehistoric mystery?

New ReviewJust kidding! It's not magic, it's science!

New ReviewCinderella's Fairy Godmother helps her escape her wicked family, go to the ball and meet her prince.

New ReviewIn this Grade 7 math lesson, students will learn how to determine the distance between the center of a circle and a point drawn on the circle when the radius is given. We begin by reviewing the definition of a circle’s radius and...

New ReviewIn this Grade 7 math video, students will learn how to extend a number pattern using a given rule with repeated division to find the sixth term. This step-by-step video models how to apply the rule correctly and use long division to...

New ReviewIn this math video lesson, students learn how to determine the approximate location of irrational square roots on a number line through a clearly modeled exemplar problem. The lesson begins by labeling the number line with perfect...

New ReviewIn this math video lesson, students learn how to use substitution to solve a system of linear equations in a clear, step-by-step way. The problem presents a system along with four possible solutions, and students are asked to determine...

New ReviewIn this math video lesson, students analyze a graph with six plotted points and determine which point could be removed so the relation becomes a function. The exemplar solution models how to apply the vertical line test, showing that...

New ReviewIn this math video, viewers will match equivalent expressions. We will learn how to expand and simplify linear expressions by combining like terms and using the distributive property. We’ll work through four linear expressions, each...

Senate Republicans are going to give it one more try on repealing and replacing Obamacare. This week, Senators Bill Cassidy (LA) and Lindsey Graham (SC) plan to bring forward a bill to repeal and replace the Afffordable Care Act. It's...

In this shorts math video, we will answer a standardized math test question about the conditional probability of drawing a blue marble from a bag of marbles. We will review the information provided to understand the number of marbles in...

In this shorts video we will learn how to factor a trinomial to answer a standardized math test question. We will first examine our answer choices and understand that each has been factored using a value of 8. We will use the table...

In this shorts video we will find the area of a Valentine's Day Heart. We will be presented with a composite figure, a heart. A composite figure is a figure composed of two or more two-dimensional figures. The heart is formed by a...

In this shorts math video we will write & solve a real world system of linear equations. We will define our variables and use the information provided to write two linear equations in two variables. We will understand that the sum of...

In this math video we will learn how to solve a nonlinear system of equations. We are given two equations - one is a quadratic equation and one is a linear equation - and four possible solutions. We are told that the system has one...

In this math video we will learn how to find a unit rate using a double number line. This visual model will make easy work of interpreting the given relationship and how to determine the unit rate with a fractional value with ease. We...

In this video we will use a double bar diagram to model how to find unit rate with one fractional quantity. We will interpret the information given. We will understand that unit rate is a rate where the second quantity is 1. I will...

In this math video we will find unit rate using a table. We will be given a relationship where one quantity is a fraction. We will set up and use a table to find the unit rate. We will find the reciprocal and multiply the fractional...

In this math video we will write and simplify a complex fraction to find unit rate. We are given a relationship and asked to find the unit rate. We will write the relationship as a ratio in fraction form. Since one of the quantities...

In this math video we will find unit rate using a table. We will be given a relationship where both quantities are fractions. We will set up and use a table to find the unit rate. We will find the reciprocal and multiply the...

In this video we will use a double bar diagram to model how to find unit rate with two fractional quantities. We will interpret the information given. We will understand that unit rate is a rate where the second quantity is 1. I will...