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Calculator Soup collects all sorts of online calculators in one free site. Calculators range from basic to complicated and have specific functions like conversion, time, finance, and chemistry. A great tool for students who do not have specific calculators or forget them.

"This free on-line graphing calculator is available to you 24hrs / 7days a week. This free online graphic calculator requires no subscription, no downloading, no soft-ware, and has no advertising. When you click on the link, a new window opens. If the calculator doesn't load right away close the new window and click on the link again. Once the window is open you may resize it or maximize it to fit your screen. "

"abaCal - Your new online calculator for applied mathematics with these UNIQUE features: * DEFINE and STORE your personal formulas easily * CALCULATE your formulas anywhere at any time * Get a GRAPHIC display of the results * SEARCH for formulas in public formula library * Use predefined variables with SI-Units"

Google's calculator tries to understand the problem you are attempting to solve without requiring you to use special syntax.

Calculation Nation™ is a free education service of The National Council of Teachers of Mathematics. NCTM is a public voice of mathematics education, providing vision, leadership, and professional development to support teachers in ensuring mathematics learning of the highest quality for all students.

From basic math to precalculus, Microsoft Mathematics 4.0 helps you visualize and see mathematical concepts as you've never seen them before. With the Microsoft Mathematics 4.0 free download, you get: * A full-featured graphing calculator * The Formulas and Equations Library * The Triangle Solver * The Unit Conversion tool * Ink handwriting support

The company has released its latest version of Mathematics as a free download. The upgrade includes ink handwriting support and a full-featured grqphic calculator. It is designed to help middle and high school students learn to solve equations step by step while it provides an overview of fundamental STEM concepts.

Free math tool download from Microsoft. Besides the scientific calculator, students can view the steps for solving various equations.

Conrad Wolfram presents an interesting argument for the way to teach Math.

"iRubric is a comprehensive rubric development, assessment, and sharing tool. Designed from the ground up, iRubric supports a variety of applications in an easy-to-use package. Best of all, iRubric is free to individual faculty and students. iRubric School-Edition empowers schools with an easy-to-use system for monitoring student learning outcomes and aligning with standards. Click. Click. Done. Scoring rubrics cannot be made any easier. Just pull up a rubric from the gradebook, click, click, and you're done. Rubric scores are automatically adjusted to the coursework grading scale and posted on the gradebook. All you have to do next is to press [save]. Students get a copy of the scored rubric securely... no more paperwork, no more calculations and no more confusion. Finally, spend more time teaching and less time grading. Only with iRubric. "

"Want to learn how to quickly square a number that ends in 5? Or how to tell if a number is divisible by 3? Or maybe you'd like to learn how to calculate square roots by hand? That's the kind of fun and fascinating math tricks and trivia you'll find here at CuriousMath.com."

This flipchart helps students explore working on commission. Using 5 case studies they can explore straight commission, salary plus commission and draw against commission. They will also learn about vocabulary that includes: salary, commission, net pay, gross pay, bonus, draw, base and wages. This flipchart allows student to interactively explore types of jobs that are commission-based as well as the the pros and cons of commission-based employment. Student will need to understand simple mathematics including addition, subtraction, multiplying, and percentages. Some actions are embedded in the flipchart like hide/show, page notes, show calculator and others.

Numbeo is a collection of Web pages containing numerical data, designed to enable anyone to contribute or modify content. Numbeo provides statistical analysis of collected data, calculates various indexes using aggregate data and periodically publishes analysis of collected data. This site lets you compare cost of living between cities around the globe. The site currently holds data for 293 major cities worldwide, and presents you detailed reports reflecting prices in areas such as Market, Transportation, Utility, Rent Per Month, Buy Apartment Price, Salaries, Restaurants and Financing.

"Enter your question or calculation and Wolfram|Alpha uses its built-in algorithms and a growing collection of data to compute the answer."

Wolfram/Alpha is to be the first web-based tool that can find answers to all systematic knowledge in the world. For educators, this "computational iknowledge engine" can find objective and fact-based answers for a variety of subject areas. Type in "Newton's Law," for example, and the formula for force is explained. Enter in an equation for a line, and the site plots the line on a graph. Ask "What is the GDP of the United States and Canada?" and a chart depicts a side-byside comparison of the nations' economic data.

The worth of monetary transactions is also difficult to measure. While there is a price, wage, or other kind of transaction that can be recorded at a precise price, the worth of the amount must be interpreted.

Honors PreCalc Blog