Wolfram Research
Wolfram Math World: Gaussian Elimination
This site provides an example of Guassian Elimination and concludes with a specific example.
CK-12 Foundation
Ck 12: Matrices to Represent Data
[Free Registration/Login may be required to access all resource tools.] A collection of resources to help students understand how to use matrices to represent and manipulate data, e.g., to represent payoffs or incidence relationships in...
Oswego City School District
Regents Exam Prep Center: Signed Numbers
This tutorial on signed numbers features lesson plans, practice pages, examples, application problems, and interactive work. Teacher resources include overhead manipulatives, card games, a Bingo game, and graphing calculator downloads.
Khan Academy
Khan Academy: Systems of Equations With Elimination Challenge
Solve systems of equations with multi-step elimination (e.g., a manipulation is needed in order for x-values and y-values to cancel each other out). Students receive immediate feedback and have the opportunity to try questions...
Paul Dawkins
Paul's Online Notes: Logarithmic Functions Practice Problems
In this section we will discuss logarithm functions, evaluation of logarithms and their properties. We will discuss many of the basic manipulations of logarithms that commonly occur in Calculus (and higher) classes. Included is a...
Illustrative Mathematics
Illustrative Mathematics: G Gpe Slopes and Circles
The purpose of this task is to lead young scholars through an algebraic approach to a well-known result from classical geometry, namely, that a point X is on the circle of diameter AB whenever angle AXB is a right angle. This consists of...
Oswego City School District
Regents Exam Prep Center: Central Tendency: Mean, Mode, Median
This tutorial discusses mean, median, and mode. It introduces the frequency table and gives several examples. A practice page is included and a teacher resource page that contains an activity using manipulatives.
Khan Academy
Khan Academy: Combining Like Terms With Rational Coefficients
Practice these problems combining like terms with rational coefficients.
Khan Academy
Khan Academy: Combining Like Terms With Rational Coefficients
Practice combining like terms for expressions that have rational coefficients. This requires adding and subtracting fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...
Khan Academy
Khan Academy: Matrix Elements
Find specific elements (also called entries) of given matrices. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Math2
Math2.org: Exponential Identities
A list of exponential rules and logarithm rules for manipulating such terms and factors in equations or expressions.
Alabama Learning Exchange
Alex: Battle to the Death: Adding Integers
The goal of this lesson is for students to use manipulatives to add integers, creating concepts rather than memorizing rules. This lesson will be related to the 300 Spartans who battled the invading Persians at the Battle of Thermopylae,...
Khan Academy
Khan Academy: Combining Like Terms With Negative Coefficients & Distribution
Practice combining like terms using the distributive property. These problems involve adding and subtracting negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...
Khan Academy
Khan Academy: Combining Like Terms With Distribution
Practice expanding expressions using the distributive property then combining like terms. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.