[Free Registration/Login may be required to access all resource tools.] The video describes how to fill in a missing number in an addition problem by working backwards. The video is followed by practice problems to assess student...

[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on finding the missing angles in triangles.

First to Five is a fun dice game for children to practice their addition math facts! Swipe the screen, add the sum of the two dice, and click on the correct sum on the chalkboard as you compete against Snake Eyes the dice tossing robot...

In this activity, students will explore finding the line of best fit based on the sum of the squares of the residuals and determine what the linear regression line is.

In this activity, students develop patterns using two or more rational number quantities. They comprehend the concept of functions by understanding the relationship between these quantities and their sums.

In this activity, students explore the operations of addition and subtraction. They use estimation, a place value chart, and a calculator to place seven randomly generated numbers in the ones and tens position in a place-value chart to...

[Free Registration/Login may be required to access all resource tools.] Find the square of a binomial and use the sum and difference formula to find the product of binomials.

This article sums up the anticipated views of Supreme Court members on the occasion of the arguments to reverse the Miranda decision.

In the activity on adding and subtracting within 10, students will use ten frames to add and subtract. They will also review key vocabulary terms, like sum, difference, and equal sign.

In a format like TV's "Who Wants to Be a Millionaire," students answer math questions about radicals to earn points and help their group win the game. Teachers need to create their own question bank, which allows this game to be used for...

Students can practice addition facts using the interactive matching games on this site.

[Free Registration/Login may be required to access all resource tools.] Solve word problems using the guess, check, and revise strategy.

[Free Registration/Login may be required to access all resource tools.] Evaluate formulas with decimal quantities using the distributive property.

[Free Registration/Login may be required to access all resource tools.] Use a number line to find the differences of integers.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to determine missing angles in a parallelogram.

[Free Registration/Login may be required to access all resource tools.] In this lesson students find the measure of the exterior angles of a polygon. Students examine guided notes, review guided practice, watch instructional videos and...

Lists the basic trigonometric identities, and specifies the set of trig identities to keep track of, as being the most useful ones for calculus.

Statistics and general information about the thirteenth moon of Jupiter. One statement sums it up: "Very little is known about Elara."

Finding the third angle of a triangle becomes easier by the explanation and examples presented.

Use the diagram on this one page website to solve the problem. There are teacher notes and the solution is only a click away.

FunBrain's easy addition facts game lets players race cars, fueled by correct answers, around a track.

This site explains the infinite series through visualization.

Basic definitions are given for foci, focus, and other terms related to the focus (foci).