Wolfram Research
Wolfram Math World: World's Most Extensive Mathematics Resource
MathWorld provides a huge mathematics encyclopedia detailing the concepts of geometry, algebra, calculus, discrete math, number theory, and other math topics--complete with formulas, diagrams, examples, and references for thorough...
CK-12 Foundation
Ck 12: Elem Math: Rounding Decimals to Specific Units in Word Problems
[Free Registration/Login may be required to access all resource tools.] In this learning module, students practice rounding decimals to the stated place value position. Includes video demonstrating a sample problem and a set of practice...
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Two Dimensional and Three Dimensional Shapes
A guide to support parents as they work with their students with two-dimensional and three-dimensional shapes.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rational Numbers and Square Ro
Math Forum response to which numbers, other than squared positive integers, can be simplified as rational numbers.
Khan Academy
Khan Academy: Negative Number Addition and Subtraction: Word Problems
Practice solving word problems with negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Negative Number Addition and Subtraction: Word Problems
Negative number addition and subtraction: word problems
Math Warehouse
Math Warehouse: Square Root Calculator and Solver
Students can type any positive or negative number into the square root calculator. The calculator reduces the square root to its simplest radical form.
PBS
Pbs Kids Afterschool Adventure!: Operation: Animal Assistants Activity Plan
The animals need help! In this week's Afterschool Adventure, children will take the role of Animal Assistants and use their spatial skills to help save the day. Each section of this weeklong adventure is introduced by a video clip or...
Calculator Soup
Calculator Soup: Math Equation Solver
Solve math problems using order of operations like PEMDAS, BEDMAS and BODMAS. This calculator solves math equations that add, subtract, multiply and divide positive and negative numbers and exponential numbers. You can also include...
Khan Academy
Khan Academy: Multiplying & Dividing Negative Numbers Word Problems
Practice matching situations to multiplication and division expressions and equations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Illustrative Mathematics
Illustrative Mathematics: A Rei Radical Equations
The purpose of the task is to show students a situation where squaring both sides of an equation can result in an equation with more solutions than the original one, because it is possible to have two unequal numbers whose squares are...
Wolfram Research
Wolfram Math World: Square Root
This math site from Mathworld.com explains what a square root is including information on imaginary numbers and many links. This site also addresses the continued fractions of positive real square roots, in particular the square root of...
Math Slice
Math Slice: Place Value Game
Test your knowledge of place value with whole numbers and decimals. A fast paced, interactive game that gives immediate feedback to responses.
Education.com
Education.com: k.g.a.1 Worksheets
[Free Registration/Login Required] These worksheets help students practice describing objects in the environment using names of shapes and describing the relative positions of these objects using terms such as above, below, beside, in...
Wolfram Research
Wolfram Math World: Descartes' Sign Rule
This page gives a good overview of Descartes' Sign Rule, a "method of determining the maximum number of positive and negative real roots of a polynomial."
Scholastic
Scholastic: Professional Development Tutorial: Increasing Vocabulary
This tutorial is a sample lesson from a Scholastic Red session on vocabulary development.
Khan Academy
Khan Academy: Interpreting Negative Number Statements
Practice problems interpreting negative number statements.
Khan Academy
Khan Academy: Interpreting Negative Number Statements
Practice matching addition and subtraction equations to real-world scenarios. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
University of Cambridge
University of Cambridge: Nrich: Number Detective
On this one page website sharpen your logic and place value skills while working on this challenge. The solution is available to double check your solution.