This site explains how to round whole numbers. Gives problems and games to practice this skill.

This site explains how to estimate sums of whole numbers. Gives practice and games to practice this skill.

This site explains how to round whole numbers to the nearest ten. The information on the site gives exercise problems and games to practice this skill in a fun and helpful way.

This site explains how to round whole numbers to the nearest thousand. Gives practice and games to master this skill.

This site explains how to round whole numbers to the nearest ten thousand. Gives exercises and games to practice this skill.

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.

This site explains how to mentally add two-digit numbers. Gives exercises and games to practice this skill.

Explains how to add two-digit numbers. Gives practice and games to practice this skill.

Explains the inverse relationship between addition and subtraction. Gives exercises and games to practice this skill.

Explains the four mathematic properties of addition. Gives exercises and games to practice this skill.

Explains how to add money. Gives exercises and games to practice this skill.

This site explains the four properties of multiplication. Gives exercises and games to practice this skill.

This site explains and lists the basic multiplication facts for ten, eleven, and twelve. Gives practice and games to practice this skill.

This lesson explains how to change mixed numbers to improper fractions, and includes games to practice this skill.

Gives a brief explanation of how to subtract fractions with the same denominator. Gives practice, and games to play to use this skill.

This site gives a brief explanation of how to compare fractions with different denominators. Gives practice and games to play to use this skill.

An interactive site that instructs and demonstrates how to find the fourth angle of a quadrilateral. This site also has many links to other interactive lessons.

Finding the third angle of a triangle becomes easier by the explanation and examples presented.

This personal page explains how to change a percent to a decimal, then offers practice and games to polish this skill.

Explains why decimals are a type of fraction. Gives practice recognizing equivalents and games to practice the skill.

As a psychological disease, drug addiction is a medical problem with psychological and physiological components. Pharmacological treatments and therapy such as AAA are examined.

Describes the First and Second New Deal initiatives enacted under President Franklin D. Roosevelt.

An article which describes the slow process of crop cultivation. The author argues that crop cultivation and village life may not have been connected.

This U.S. Supreme Court case declared the first Agricultural Adjustment Act (AAA) of the New Deal illegal because of the issue of Federalism. This resource provides an abstract containing a concise summary, a link to the full text of the...