Texas Instruments
Texas Instruments: Boats in Motion
In this lesson, students make observations about the motion of a boat going up and down the river. They will solve the system of equations algebraically and graphically.
Illustrative Mathematics
Illustrative Mathematics: A rei.c and a rei.a.1: Products and Reciprocals
The purpose of this task is to test student skills at converting verbal statements into two algebraic equations and then solving those equations. Aligns with A-REI.A.1 and A-REI.C.
Illustrative Mathematics
Illustrative Mathematics: A Rei Pairs of Whole Numbers
The premise of this problem is simple - students must find three whole numbers with three different sums when they are added in pairs. To do this, they set up a system of linear equations in three variables. Aligns with A-REI.C.6.
Alabama Learning Exchange
Alex: Imaginary Numbers? What Do You Mean Imaginary?
Is it any wonder that students are suspicious? We lead, sometimes drag, them through Algebra I insisting they must follow the order of operations. We make them learn the "hard way" of doing an assignment one day only to show them the...
Illustrative Mathematics
Illustrative Mathematics: A Rei Pythagorean Triples
This task has two separate goals: the first is to solve a pair of equations, one quadratic and the other linear. The second goal is to observe that a point that lies on a circle gives rise to a Pythagorean triple. Aligns with A-REI.C.7.
Wolfram Research
Wolfram Math World: Line
This MathWorld site gives Euclid's definition of a line, properties of lines, common terminology, and algebraic representations of lines and their distinctive parts in a cartesian system. The site then goes into detail of different line...
Texas Instruments
Texas Instruments: Staggered Races 1: Varying the ?B? In Y=mx+b
The primary focus in this activity is on parallel lines and equivalent equations. In Activity 1 and Activity 2, the class collectively will create a system of parallel and coinciding lines. It is important to focus on parallel lines...
CK-12 Foundation
Ck 12: Algebra: Special Products of Polynomials
[Free Registration/Login may be required to access all resource tools.] Recognize patterns of polynomials that are the product of two binomials.
CK-12 Foundation
Ck 12: Algebra: Zero, Negative, and Fractional Exponents
[Free Registration/Login may be required to access all resource tools.] This lesson covers how to simplify negative and zero exponents.
Other
Hong Kong University of Science and Technology: Augmented Matrix
Demonstration of how an augmented matrix is used to solve a system of linear equations.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Ecuaciones Y Sistemas De Ecuaciones
In Spanish. Practice how to solve system of equations graphically with this interactive activity.
Other
Hsor.org: Frankfurter High: Hot Dog Sales
Determine the number of hot dogs needed in order to make a profit with little waste. Adobe required.
Other
Hsor.org: High Step Shoes: Product Mix
Determine the profits and the efficiency of the shoe company.
Analyze Math
Analyze Math: Calculate Determinant of a Matrix
Learners explore the Algebra II topic of matrices. The tutorial demonstrates how to calculate the determinant of 2 by 2 and 3 by 3 matrices. The activity includes examples with detailed solutions.
Khan Academy
Khan Academy: Manipulate Expressions Using Structure
Rewrite an expression containing two unknown variables by choosing a given equation that is equivalent. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
CK-12 Foundation
Ck 12: Introduction to Matrices: Matrices to Represent Data
[Free Registration/Login may be required to access all resource tools.] This lesson defines, organizes, and compares matrices. Includes examples, video, and review problems.
Khan Academy
Khan Academy: Solutions of Inequalities Graphically
Given the graph of a two-variable linear inequality, check whether a given pair of values is a solution of the inequality. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or...
Cool Math
Coolmath: Cramer's Rule for 3x3's
Use this tutorial to learn how Cramer's Rule works for 3 x 3.
Other
Hsor.org: Latisha Develops an Investment Plan: Decision Variables
Latisha is trying to decide on an investment plan that will make the most money, help her determine the best plan.
Other
Hsor.org: Pizza Pi: Work Force
High School Operations Research Math Modules - Applied Mathematics for decision making in industry and government
University of St. Andrews (UK)
University of St. Andrews: History of Matrices
The University of St. Andrews allows you to look through the history of matrices.
Khan Academy
Khan Academy: Age Word Problems
In this exercise, students practice age word problems. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.