Quiz time! Part eight in a 14-part series about solids, liquids, and gases provides an opportunity to assess individual's learning. The interactive quiz covers the topics of solubility, solubility curves, and diffusion.

Where did the transformation begin? Using a ruler, the narrator of a short presentation shows how to find the center of enlargement for transformed figures. Worksheets provide the class members an opportunity to practice the newly...

The narrator of a short video explains the steps in constructing a triangle given the measure of two angles and the length of the side between the angles. The resource provides opportunities for pupils to practice the skill with two...

Find the one in the middle. An informative resource explains how to determine the median of a set of numbers. Using both even and odd numbers of data points, the video covers the process of finding the middle number. Worksheets provide...

Make the complicated look relatively simple. The video shows how multiplication of algebraic fractions is easier when they factor the numerators and denominators. Pupils see which factors will cancel, or divide out, easier when writing...

Get a clearer picture of working with fractions. While continuing to work with fractions as parts, the video shows how to use drawing to compare and add fractions. Worksheets then provide opportunities for pupils to practice comparing,...

Change may be slow in coming, but things do change. Oprah Winfrey and Black Entertainment Television CEO, Robert L. Johnson, discuss the opportunities available to them due to the efforts of Dr. Martin Luther King, Jr. and other civil...

Discover the secrets used by scientists to measure mechanical waves. Young physicists learn about measurable wave qualities—amplitude, wavelength, and frequency—by watching and listening to a video discussing longitudinal and transverse...

Gravity does more than keep our feet on the ground — it holds a satellite in orbit, too. Help learners understand the effects of gravity on an orbiting object through a simulation activity. Individuals adjust a launch speed and watch as...

How will a scale factor affect a figure—negatively? Using a grid, the narrator of an engaging video performs a dilation with a negative scale factor. The presenter compares a positive scale factor with a negative scale factor to explain...

Count on the scale to enlarge a figure. The video shows how to create an enlargement given a scale factor and a center of enlargement. The presenter multiplies the vertical and horizontal distance by the scale factor to find the new...

Create a 45-degree angle without bisecting an angle. A video shows a method to construct a 45-degree angle without needing to bisect a right angle. By constructing an isosceles right triangle, the presenter constructs a 45-degree angle...

Most frequently prefer the mode. The resource defines the mode and shows how to determine it in a data set. Using another type of problem, the video develops a data set with a given mode and number of data points.

Do the keep, change, flip dance. The resource shows that the division of algebraic fractions follows the same rules as dividing numerical fractions. Pupils understand that if they can multiply rational expressions, they can divide...

Mark off the length of the radius around the circle. Using a compass, the presenter shows how to construct a regular hexagon in a circle. Pupils see how triangles formed in the hexagon are equilateral, allowing for the construction to...

Cut it up into parts and make fractions. The short video provides a definition of fractions as being a representation of parts of a whole. Using drawings, the presentation shows how to determine the bottom and top numbers for a fraction...

The United States Civil War forced Northern and Southern societies, as well as the people who made up those societies, to reconstruct their vision of themselves and their identities. A series of video-based web lessons look at the great...

Model the world with graphs. Pupils watch and participate in creating graphs to model real-world situations. The presenters stress the importance of a consistent scale and proper labels for the graphs along with identification of the...

Take a rational look at solving equations. Learners watch a video presentation on solving simple rational equations that shows solving the equation along with finding excluded values. Viewers then practice the skill with the worksheets...

Develop a sequence of descriptions. Learners watch an introduction to sequences, their notations, and how to graph them. Pupils use full sentences to describe the sequence and how to get from one term to the next, without needing to...

Linear or exponential?. Learners watch an informative video comparing situations that may be modeled by either a linear or exponential relationship. Pupils determine the type of relationship and then create a function that models the...

Gather together as a group for the best results. Pupils watch a video on how to use the distributive property to multiply polynomials. Scholars continue to watch as the presentation shows how to factor trinomials by grouping. Finally,...

Show more than one way to prove similarity. Scholars learn three different methods to show two triangles are similar, Angle-Angle, Side-Side-Side, and Side-Angle-Side. Pupils practice applying these methods to determine whether two given...