Fifth graders determine how to convert fractions, decimals, and percents. For this conversion lesson, 5th graders use an on-line applet to practice making these conversions. They review how to make the conversions in a whole class lesson...

Third graders understand the economics of choices in buying. In this goods and services lesson, 3rd graders participate in activities to make choices about purchases. Students write stories, answer questions, and complete worksheets to...

The binary number system is used to represent data in digital form. This site provides a binary calculator that will convert between binary, octal, decimal and hexadecimal, perform simple addition and subtraction, and do compliment and...