K12math.com

Calculus Integrals

2011-09-26T11:57:00.000-07:00

There is a new article in the Calculus > Integration section of k12math.com covering integrals

It describes the fundamental theorem of calculus. We hope you find it useful :).

Functions

2007-06-18T05:16:00.000-07:00

There are times when various quantities can be related to one another. If this relationship follows a regular pattern then we can assign variables to these quantities and write a mathematical equation to express this relationship. This relationship is called a function. More on functions...

Scientific Notation Practice

2007-04-24T08:36:00.000-07:00

Scientific Notation (exponential notation) refers to writing decimal numbers as a number multiplied by a power of 10. Now this is done in a certain way. What this boils down to is moving a decimal point, keeping track of how many places you moved it, and increasing or decreasing the power of 10 by that number of decimal...(cont. Scientific Notation Practice)

Equations of the Line

2007-04-19T07:27:00.000-07:00

Linear equations have variables whose highest power is 1. Also the variables are not multiplied together. We say there is a linear relationship between the variables in these equations. This linear relationship implies that as one variable changes the other changes with a constant rate of change....(cont. Linear Equations)

Exploring Inequalities

2007-04-19T07:22:00.000-07:00

An inequality is a special equation that describes how two expressions are not equal. The signs <, ≤, ≠, >, and ≥ are used to express inequalities...(cont. Inequalities article)

Quadratic Equations Tutorial

2007-03-30T06:57:00.000-07:00

A quadratic function is an equation where the exponents of the variables are not greater than 2 but at least one variable with an exponent of 2, and if the variables are multiplied, not greater than 2. ...quadratic equations free lesson plan

I posted a new free math lesson plan to K12math.com on quadratic equations. Please feel free to download it and use it for your students or in your classroom.

Sincerely,
Russ Lewis
k12math.com

Teaching Number Bases

2007-03-26T18:01:00.000-07:00

As pointed out in the discussion Why Study Math various schemes were used to represent numbers throughout the ages. All of these systems did not support fundamental operations such as addition and subtraction. ...free math lesson plan on number bases

Irrational Numbers Tutorial

2007-03-26T17:59:00.000-07:00

Irrational numbers are numbers that cannot be expressed as the ratio of
two integers. See rationals.

One of the first irrational numbers discovered

Rational Numbers Tutorial

2007-03-26T17:57:00.000-07:00

A rational number is any number that can be represented by the ratio of two integers. ...free math lesson plan on rational numbers

Real Numbers Tutorial

2007-03-26T17:49:00.000-07:00

The Real numbers include the integers, the rational, and the irrational numbers and are represented as points on the number line. Every real number has its own position on this number line, and this one to one correspondence with no gaps makes these numbers a continuum. ...for a free math lesson plan on real numbers

How to find a math tutor...

2007-03-20T05:46:00.000-07:00

Cost of math tutoring can become a large factor. If you child needs long term math tutoring, not a bad thing, the cost of a professional math tutor can become high. Try finding one of your child's friends that is good in that particular area of math...more on math tutoring.

Graphing and Coordinates

2007-03-20T05:44:00.000-07:00

A function relates one variable to another. Usually this is done in terms of an equation involving one variable on the left hand side of the equals sign and an expression involving another variable and other constants...for more on graphing and coordinates.

Linear Equations

2007-03-20T05:38:00.000-07:00

Part 2 (Linear Equations) in a series of free articles for teachers, parents, and students on Linear Equations. Linear Equations generally fall into Algebra and Algebra 1 concepts.

Trigonometry defined

2007-03-20T05:30:00.000-07:00

Trigonometry is the study of triangle measurement and...trigonometry defined (cont.)

Teaching Decimals

2007-03-20T05:28:00.000-07:00

Decimals are numbers written using 10 as the base. Each position of the decimal number represents a power of 10 and the decimal point, the period '.', is used to indicate how the powers of ten advance as you move...Decimals (cont.)

Teaching Money Concepts

2007-03-09T05:41:00.000-08:00

Teaching your child about money reinforces the basic number facts of the base 10 number system: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. At first, for younger children, you can count the number ...
link to Teaching Money Concepts article

Simplifying Expressions

2007-03-05T17:54:00.000-08:00

Simplifying Expressions
Simplifying expressions is a skill that requires a significant amount of practice. Prerequisite is a clear and thorough understanding of the properties of integers which apply to the real numbers as well. These properties may seem obvious; when applied to variables, somehow they lose their opacity. These laws should be reviewed and reinforced as they are used (with numerical examples as examples) to simplify algebraic expressions. Variables and constants represent real numbers and therefore abide by these laws. ...full article by Russ Lewis

Solving Linear Equations

2007-03-05T05:57:00.000-08:00

A linear equation involves variables whose exponents are "1."
A linear equation will also contain constants named with letters and/or numbers.
Solving a linear equation refers to writing an expression with the variable or constant in question on the left hand side of the equals sign with everything else on the right hand side of the equals sign. ...for the rest of the article on linear equations.

Linear equations article by Russ Lewis

Fractions

2007-02-13T19:48:00.000-08:00

For an excellent, concise, explanation of fractions visit www.k12math.com. Mr. Lewis has provided a free tutorial on fractions there.

Ratios

2007-02-13T19:45:00.000-08:00

A RATIO is a relationship between two quantities expressed as a fraction. To see a full article and explanation of ratios by Mr. Lewis visit www.k12math.com

Math in Real Life

2007-02-13T09:01:00.000-08:00

Staff member (volunteer) Beau Claar has joined Virtual Premise, a lease software provider, were he will be putting some of his math skills to work. As a math student, if you wonder where math majors are employed, this is a good example of "math in the workplace". Beau will be working on applying his math skills to problems relating to companies managing their leases and the accounting necessary. Most of the time all software needs math. As a software developer you will always employ base 10 math skills and base 2 math skills.
Sincerely,
Professor Lewis

Point Line Lesson Plan

2007-01-30T13:14:00.000-08:00

Get a free math lesson plan for teaching the "Point Line" to Kindergartners here http://www.k12math.com/kindergarten-math/point_line.htm

Kindergarten Independent Investigation

2007-01-30T13:13:00.000-08:00

Free Lesson Plan for Independent Investigation - Kindergarten Math
...a free lesson plan for teaching Kindergartners "Independent Investigation" has been posted here http://www.k12math.com/kindergarten-math/independent_invest.htm

Kindergarten Math Manipulatives Lesson Plan

2007-01-30T13:08:00.000-08:00

Patterns Manipulatives Lesson Plan for Kindergarten
...another free math lesson plan has been posted for teaching patterns to Kindergartners.
http://k12math.com/kindergarten-math/patterns_manip.htm

State Math Standards

2007-01-30T10:25:00.000-08:00

Links to all state math standards other than Rhode Island and Vermont have been posted to www.k12math.com.
Sincerely,
The volunteer staff of BTRWare