Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Line of Best Fit

For Students 9th - 10th Standards
Use this activity to practice how to enter a set of data, plot the data on a coordinate grid, and determine the equation for a line of best fit.
Lesson Plan
Better Lesson

Better Lesson: Coordinate Grid and Geometry

For Teachers 6th - 7th Standards
Learners make connections between the coordinate grid and Geometry by finding the distance of line segments using the coordinate plane. This lesson includes a detailed lesson plan, slides containing notes and problems, and a...
Graphic
The Franklin Institute

Frankin Institute Online: Group Graphing

For Students 3rd - 8th Standards
This site from The Franklin Institute explores how to make a simple graph using a spreadsheet to portray survey data. It also gives a set of interesting sports-related web sites so that students can get statistical inforamtion.
Activity
Texas Instruments

Texas Instruments: Defining the Parabola

For Teachers 9th - 10th
The teacher will graph a horizontal line and plot a point using TI-Navigator, and the class will provide the points that create a parabola.