Twelve chapters cover a multitude of math concepts found in the Common Core standards for sixth grade. Each title provides a brief explanation of what you will find inside the chapter—concepts from which you can click on and learn more...

This site examines the specific difference between mass and weight in addition to length, temperature, and time.

Recall that a portion of a circle is called an arc. One way to measure an arc is with degrees.

Explores how to measure the length of a line segment through examples and a video lesson. [0:40]

The voltage in AC circuits oscillates at a rate known as the frequency. With an oscilloscope, see and measure the length of time between signals, and calculate the frequency of an AC signal.

Rather than dividing a circle into some number of segments (like 360 degrees), mathematicians often prefer to measure angles using the circumference of a unit circle - a circle with radius 1. This way of measuring angles is called...