AAA Math
Aaa Math: Round to Nearest Ten Thousand
This site explains how to round whole numbers to the nearest ten thousand. Gives exercises and games to practice this skill.
AAA Math
Aaa Math: Round to Nearest Hundred Thousand
This site explains how to round whole numbers to the nearest hundred thousand. Gives practice and games to practice this skill which are fun and helpful on the subject.
AAA Math
Aaa Math: Mentally Adding Two Digit Numbers
This site explains how to mentally add two-digit numbers. Gives exercises and games to practice this skill.
AAA Math
Aaa Math: Adding Two Digit Numbers
Explains how to add two-digit numbers. Gives practice and games to practice this skill.
AAA Math
Aaa Math: Inverse Relationship of Addition and Subtraction
Explains the inverse relationship between addition and subtraction. Gives exercises and games to practice this skill.
AAA Math
Aaa Math: Properties of Addition
Explains the four mathematic properties of addition. Gives exercises and games to practice this skill.
AAA Math
Aaa Math: Adding Money Amounts
Explains how to add money. Gives exercises and games to practice this skill.
AAA Math
Aaa Math: Multiplication Facts by 0, 1, 2, 3
This page explains and lists the basic multiplication facts for zero, one, two, and three. It also provides practice and games to improve multiplication skills. CCSS.Math.Content.3.OA.C.7 Fluently multiply and divide within 100
AAA Math
Aaa Math: All About Multiplication
This lesson gives practice with the basic multiplication facts for zero to twelve and games to practice this skill. Content is available in labelled sections so you can find just the piece you need.
AAA Math
Aaa Math: Place Values
This lesson explains how to determine the place value of a number for the ones, tens, and hundreds places. Includes practice and games to practice this skill.
AAA Math
Aaa Math: Identifying Place Value
This tutorial explains how to determine the place value of a number from ones to the one millions place. Includes practice and games to practice this skill.
Boston University
Boston University: Chaos, Fractals and Arcadia
This is an interesting site for information on chaos and fractals. Includes links to interactive activities to learn more.
Boston University
Bu: Fractal Geometry of the Mandelbrot Set
This site progresses in iterations through Mandelbrot and Julia sets to explain fractals and the mathematics behind them.
AAA Math
Aaa Math: Addition of Decimals
This lesson explains how to add decimals of the tenths place value. Gives practice and games to work on this skill.
ibiblio
Ibiblio: Greek Mathematics and Its Modern Heirs
This ibiblio.org site discusses the "Classical roots of the scientific revolution," with concentration on the Greek mathematicians from the 5th century BC to the 5th century AD who "Maintained a splendid tradition of work in the exact...
AAA Math
Aaa Math: Comparing Fractions
Explains how to compare fractions with unlike numerators and denominators, and includes games to practice this skill.
AAA Math
Aaa Math: Division by 10, 11, and 12
Explains the basic facts for division by 10, 11, and 12. Gives problems and games to practice this skill.
AAA Math
Aaa Math: Subtracting Fractions With Same Denominator
Gives a brief explanation of how to subtract fractions with the same denominator. Gives practice, and games to play to use this skill.
AAA Math
Aaa Math: Identifying Equivalent Fractions
This site gives a brief explanation of how to compare fractions with different denominators. Gives practice and games to play to use this skill.
National Council of Teachers of Mathematics
The Math Forum: Suzanne Alejandre: Factor Lesson
Pupils will discover factoring through the area of a rectangle.
University of Georgia
University of Georgia: Altitudes & Orthocenters: Making Connections
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
University of California
Geometry Junkyard: Dissection Tiling
A great and very informative article about dissection tiling or tessellation.
Rice University
Galileo Project: Christoff Rudolff
This site from The Galileo Project of Rice University provides ten fields of biographical data which are compiled for you. The fields of data collected include, but are not limited to, dates (birth/death), father (occupation/wealth),...
Rice University
Galileo Project: Pierre Fermat
This site from The Galileo Project of Rice University provides information on ten fields of biographical data which are compiled regarding Pierre Fermat, including dates (birth/death), father (occupation/wealth), nationality, education,...