A complete lesson plan by Evan-Moor Publishing. For Grade 4, Grade 5, Grade 6. This lesson plan is sold separately and is not included with any subscription or study pack.

A calculator is generally defined as (1) any small handheld device that automatically performs arithmetic operations, certain mathematical functions, simple text editing, or elementary programming, or (2) a software program on a computer that simulates...

Throughout human history man has invented devices to make repetitive tasks, such as mathematical calculation, easier. For much of history, this was difficult. The advent of methods, which progressed to machines, to help with this dilemma made life much...

Within a few years of its invention in 1959, the integrated circuit (microchip)--tiny, complex electronic circuits on a single chip of silicon--had become reliable and inexpensive. The president of Texas Instruments, Patrick Haggerty, wanted to...

The calculator is a computing machine. Its purpose is to do mathematics; basic calculators do the basic mathematical functions (addition, subtraction, division, and multiplication) while the more advanced ones, which are relatively new in the history...

A calculator is a electronics device for performing mathematical calculations, distinguished from a computer generally by a limited problem domain and an interface optimized for interactive calculation rather than extensive programming. Calculators can...

I’m going to devote a few posts to the Larry Craig drama this morning, because it raises a variety of issues, some immediate and political, and others a bit more complex. The immediate political question is what effect this will have on ’08 Senate politics....

A widely used tool for predicting a woman's risk of breast cancer is getting an update — to better reflect black women's risk. At issue is the National Cancer Institute's online risk calculator. Answer a few questions — such as current age, age when your...

Obsessing over pocket calculators might not be the hippest hobby for today's online generation, but Hewlett-Packard Co. is hoping a quirky contest will draw out their bravest fans.The Palo Alto-based technology company is marking its 35th year in the handheld calculator business by encouraging the...

A new study that estimates how much digital information is zipping around (hint: a lot) finds that for the first time, there's not enough storage space to hold it all. Good thing we delete some stuff.The report, assembled by the technology research firm IDC, sought...