Learners discover that multiplying transformation matrices produces a composition of transformations. Using software, they map the transformations and relate their findings to the matrices. 

How can matrices help us solve linear systems? Learners explore this question as they apply their understanding of transformation matrices to linear systems. They discover the inverse matrix and use it to solve the matrix equation...

Engage young mathematicians in developing their basic arithmetic skills with these great hands-on activities. Using Unifix® cubes to model a variety of single digit addition and subtract problems, children build a basic...

Is it a right triangle or not? Introduce scholars to the converse of the Pythagorean Theorem with a lesson that also provides a proof by contradiction of the converse. Pupils use the converse to determine whether triangles with given...

Uncover the properties of translations through this exploratory lesson. Learners apply vectors to describe and verify transformations in the second installment of a series of 18. It provides multiple opportunities to practice this...

This lesson introduces the idea of slope and defines it as a numerical measurement of the steepness of a line. Pupils then use the definition to compare lines, find positive and negative slopes, and notice their definition holds for...

Build tables by understanding their structure. Scholars take a closer look at the structure of ratio tables in the 10th segment in a 29-part series. Individuals realize that the tables can be built using an additive or...

How can you complete a simulation when it is not practical to determine the probability of an event? Class members learn that in some situations, it is not feasible to find the probability of an event, but they can estimate it by running...

Here is an interesting and somewhat interactive presentation. Covering the French Revolution, the slide show begins with a timeline of Napoleon's rise to power and ultimate fall. Main ideas for each event are then outlined with critical...

Can your kindergartners identify which group of pictures has one fewer? Given three groups of pictures (kites, planes, and butterflies), youngsters count the amount of items and check the box for the group that has one fewer. A great way...

Keep track of all your favorite sites with this handy record page. Included here are two PDF versions (one in black and one in blue), and two Word document versions that you can use to type in the site information.

Increase your sample and increase your accuracy! Scholars complete an activity that compares sample size to variability in results. Learners realize that the greater the sample size, the smaller the range in the distribution of sample...

Reduce variability for more accurate statistics. Through simulation, learners examine sample data and calculate a sample mean. They understand that increasing the number of samples creates results that are more representative of the...

Class members perform complex operations on a plane in the 17th segment in the 32-part series. Learners first verify that multiplication by the reciprocal does the same geometrically as it does algebraically. The class then circles back...

What does similarity have to do with the Pythagorean Theorem? The activity steps through the proof of the Pythagorean Theorem by using similar triangles. Next, the teacher leads a discussion of the proof and follows it by an animated...

Coal forms from the ancient remains of plants that were alive on Earth before the dinosaurs! Scholars use their t-charts from the previous instructional activity over resources and research to determine if their information is correct....

The 13th instructional activity in a unit of 22 introduces the concept of the interquartile range (IQR). Class members learn to determine the interquartile range, interpret within the context of the data, and finish by finding the...

For many people, Barack Obama's presidency was the next step in Martin Luther King, Jr's dream of America's future. Explore the dreams of Americans past and present, as well as the young Americans in your class, with a set of activities...

Test your students' number line skills with these sequences, which they must finish and then indicate if they are ascending or descending. Numbers range from negative numbers to decimals. This activity would be a great teaching tool for...

Owl shares her worms with her best mates Fluffy and Bill. As worms are distributed to the two of them learners will see that when there is one left over the number is odd and when they have the same amount the number is even. This is a...

What a fun way for youngsters to practice numbers! Using Playdough (or another type of moldable dough, which can be made at home easily), learners create lengths to place over large number cards, tracing the numbers 1-10. Then, they...

Whether you need a math drill or a comprehensive review, here is a great addition to any math lesson. After reviewing how to find fractions of whole numbers, pupils work on problems, such as 1/8 of 72 and 1/2 of 114. Use this activity as...

Looking to introduce some text-based questions into your ELA lessons? Practice the kinds of skills the Common Core demands with the seven text-based questions and the essay prompt provided here. Designed to be a three-day lesson, day one...

A fan of Ari's Crispin trilogy? Here is a packet that contains study guides for all three Crispin novels: The Cross of Lead, At the Edge of the World, and The End of Time.