New York Times
New York Times: Steven Strogatz on the Elements of Math Series the New York Times
[Free Registration/Login Required] On this site, Cornell University mathematics professor, Steven Strogatz, shares his 15-part series of columns on the elements of math. He investigates topics ranging from negative numbers to subtraction...
OER Commons
Oer Commons: The Effects of Positive & Negative Numbers
Seventh graders explore what happens to a hot air balloon when they add or remove units of weight or heat. This activity is an informal exploration of addition and subtraction with positive and negative integers.
Other
Cyber Sleuth Kids: Number Line Worksheets
Using a number line has just gotten a little easier for teachers and students in this site from CyberSleuth that contains an assortment of printable number line worksheets. Here you will find blank number lines, number lines with...
Khan Academy
Khan Academy: Practice: Adding Negative Numbers
Practice adding one-digit positive and negative numbers.
Khan Academy
Khan Academy: Dividing Negative Numbers Review
Summarizes the rules for dividing with negative numbers, along with examples, and presents three practice questions.
Khan Academy
Khan Academy: Multiplying Negative Numbers Review
Summarizes the rules for multiplying with negative numbers, along with examples, and presents three practice questions.
OnlineMathLearning.com
Online Math Learning: Multiplying and Dividing Positive & Negative Decimals
An interactive worksheet for practice in the multiplication and division of decimals with positive and negative signs.
OnlineMathLearning.com
Online Math Learning: Adding & Subtracting Positive & Negative Decimals
An interactive worksheet for practice in the addition and subtraction of decimals with positive and negative signs.
Mr. Martini's Classroom
Mr. Martini's Classroom: Negative Number Division Cards: Fill in the Blank
Students type the correct positive or negative number to complete the division problems on these interactive flashcards. The problem changes color when the correct number is typed.
Knowledge Share
Super Kids: Addition and Subtraction Worksheet Creator
Create your own addition/subtraction math facts worksheets. Use them in the classroom for practice or timed drills, or at home! Choose from two levels of difficulty, and vertical or horizontal equation format. You input minimum and...
Cool Math
Coolmath: Finding the Opposite of a Number
This prealgebra lesson gives you practice on finding opposite numbers.
Other
Mathsframe: Sequences
Students can solve number sequences and skip count with positive and negative whole numbers and decimals.
ClassFlow
Class Flow: Positive and Negative Numbers
[Free Registration/Login Required] This lesson is an early introduction to positive and negative numbers.
Wyzant
Wyzant: Simplifying Multiple Signs Worksheet
Dealing with multiple positive and negative signs in an algebra equation can be a challenge for some students. This inter-active quiz from WyzAnt provides 20 multiple-sign equations and their answers for students to test their knowledge.
Mr. Martini's Classroom
Mr. Martini's Classroom: Negative Number Multiplication Cards
Students multiply positive and negative numbers on these interactive flashcards. The problem changes color when the correct product is typed.
ClassFlow
Class Flow: Negative Numbers
[Free Registration/Login Required] In this flipchart students apply their knowledge of integers to combine positive and negative integers and locate their position on a number line.
Mr. Martini's Classroom
Mr. Martini's Classroom: Negative Number Subtraction Cards, Fill in the Blank
Students type the correct positive or negative number to complete the subtraction problems on these interactive flashcards. The problem changes color when the correct number is typed.
ClassFlow
Class Flow: Number Sense Integers
[Free Registration/Login Required] This flipchart will help students understand positive and negative integers and use them in computations and includes Activote questions for assessment.
ClassFlow
Class Flow: Order Negative
[Free Registration/Login Required] The teacher will use this lesson plan flipchart to review positive and negative numbers.
Mr. Martini's Classroom
Mr. Martini's Classroom: Negative Number Multiplication Flashcards
Students multiply positive and negative numbers with these interactive flashcards. The problem changes color when the correct number is typed.
Mr. Martini's Classroom
Mr. Martini's Classroom: Negative Number Division Cards
Students practice dividing positive and negative numbers with these interactive flashcards. The problem changes color when the correct number is typed.
Mr. Martini's Classroom
Mr. Martini's Classroom: Negative Number Subtraction Flashcards
Students solve positive and negative number subtraction problems on these interactive flashcards. The problem changes color when the correct number is typed.
National Council of Teachers of Mathematics
Nctm: Illuminations: Volt Meter
As you put the different type of batteries on the volt meter pay attention to the voltage equations in the table. See how positive and negative numbers interact.
PBS
Pbs Kids: Cyberchase: Space Coupe to the Rescue
This interactive game allows users to practice with positive and negative numbers.