Cornell Lab of Ornithology
Habitat Network: Fen Wetlands
Sometimes called rich fens, find out about these saturated environments that are fed with mineral-rich groundwater and occur at low points or slopes in the landscape where the soil surface is intercepted by the water table.
CK-12 Foundation
Ck 12: Algebra: Graphs of Linear Functions
[Free Registration/Login may be required to access all resource tools.] Students learn to use function notation to graph functions. Students examine guided notes, review guided practice, study vocabulary, watch instructional videos and...
Alabama Learning Exchange
Alex: Math Is Functional
This lesson is a technology-based activity in which students extend graphing of linear functions to the use of spreadsheet software. After students have become proficient in constructing a table of values, students are able to...
PBS
Pbs: Modeling the Linear Relationship Between Fahrenheit and Celsius
Explore the relationship between degrees Fahrenheit and degrees Celsius. This video focuses on developing an expression to model the relationship between the temperature scales using a line graph to calculate slope and the y intercept.
Vision Learning
Visionlearning: Linear Equations in Science: Relationships With Two Variables
An introduction to the history of linear equations and how they relate to science.
Illustrative Mathematics
Illustrative Mathematics: S Id.6a,7 Olympic Men's 100 Meter Dash
This task asks students to identify when two quantitative variables show evidence of a linear association and to describe the strength and direction of that association. Students will use a scatterplot showing the finishing times for the...
Math Open Reference
Math Open Reference: Intersection of Two Straight Lines
Learn about the intersection of two straight lines with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhance further explanation. Includes links to related topics.
Khan Academy
Khan: Lesson 5: Relationships Among Linear Equations, Lines in Coordinate Plane
This lesson focuses on the relationship between algebraic, graphical, and contextual expressions of linear equations.
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Parallel and Perpendicular Lines
Given a line, learn how to find the equations for lines that are perpendicular and parallel to it. This tutorial offers several example graphs and problems as well as practice problems for you to work through when you're ready.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: General Linear Equation
This site by the Northeast Parallel Architecture Center, Syracuse University, shows the different forms of linear equations for a line.
CK-12 Foundation
Ck 12: Algebra: Applications Using Linear Models
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn how to use various forms of linear equations to solve problems. Students watch a video tutorial, explore guided notes and attempt...
Texas Instruments
Texas Instruments: Investigating Equations of Lines
In this activity, students explore the equations of lines written in the form: y = mx + b. They move points defining the lines, and view the related changes in the parameters of the equations.
Texas Instruments
Texas Instruments: Using the Transform Application in an Algebra Class
This activity is intended to be a discovery activity for students to determine the effect that changing m and b have on the equation y=mx+b. There is a teacher guide and an activity to determine the student's level of understanding.
Khan Academy
Khan Academy: Domain of Modeling Functions
In this exercise, students practice identifying the domain of modeling functions. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Checking Solutions to Two Variable Linear Equations
In this exercise, students practice checking solutions to two-variable linear equations. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Texas Education Agency
Texas Gateway: Solving Equations and Inequalities
Given verbal and symbolic representations in the form of equations or inequalities, the student will transform and solve the equations or inequalities.
CK-12 Foundation
Ck 12: Algebra: Linear Inequalities in Two Variables
[Free Registration/Login may be required to access all resource tools.] Solve and graph linear inequalities in two variables on the coordinate plane.
Khan Academy
Khan Academy: Rendering: Ready to Dive Into Some Math?
In this lesson we are going to explore the most fundamental calculation a ray tracer performs: ray object intersection. It also lists information you need to know before you start this lesson.
Paul Dawkins
Paul's Online Notes: Algebra Cheat Sheet [Pdf]
An algebra "cheat sheet" to use as a reference when completing algebra homework. Lists basic facts, properties, operations, formulas, and functions, as well as common errors.
Curated OER
Webmath.com: Graph a Line
WebMath.com offers a java applet that allows you to input the slope of a line and a point on the line and gives you the equation, in slope-intercept form, of the line with the given slope that passes through the point. It also includes a...
Better Lesson
Better Lesson: Analyzing Linear Functions
This unit is all about linear relationships and functions.
Wolfram Research
Wolfram Math World: Algebra
MathWorld provides a basic overview of Algebra. Includes a few formulas and many links to related topics.
Sophia Learning
Sophia: Writing a Linear Equation From a Parallel Line and Point: Lesson 1
This lesson presents how to write an equation of a line that passes through a given point and is parallel to a given line. It is 1 of 5 in the series titled "Writing a Linear Equation from a Parallel Line and Point."
Free Math Help
Free Math Help: Direct Variation
The discussion examines direct variation. Students learn about the math concept through definitions and sample exercises.