Curated OER
Earth and Seasons
Sixth graders comprehend that the path Earth takes as it revolves around the sun is called its orbit. They also comprehend that the axis is an imaginary line that passes through Earth's center and its North and South Poles. Students...
Curated OER
Confocal Conics
Students describe conic sections from an equation or graph. They examine a family of conics that share a vertex, describe their relationship and write an equation. Students interpret the relationship between conic sections and write...
Curated OER
Observing Mars in the Night Sky
Students compare and contrast the orbits of Earth and Mars, locate the planet Mars, and diagram its retrograde motion.
Curated OER
Graphs and Ellipses
Students explore linear graphs, the parabola and the rectangular hyperbola.
Curated OER
Ellipses And Kepler's First Law
Learners explain that planets actually orbit the center of gravity of the solar system, and that distant planets may be detected by motions of their central star around the centers of gravity of their planetary systems.
Curated OER
Graphs And Ellipses
Learners become acquainted with linear graphs, the parabola and the rectangular hyperbola. Also prepare tables of paired values as preparation for plotting a line. They study the cartesian equation of an ellipse, with a worked example.
Other
Platonic Realms: Function
Resource provides an introduction to conics. A picture of each conic, the definition, and a brief discussion about the standard form of conic equations are given, along with encouragement to master conics.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Ellipses
Thirty problems present a variety of practice working with ellipses. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check each...
Interactive Mathematics
Interactive Mathematics: The Ellipse
This excellent lesson offers a thorough definition, description, and then step-by-step analysis of ellipses. Includes a focus upon the vertical and horizontal, major and minor axes, transllations of ellipses and more.
University of St. Andrews (UK)
University of St. Andrews: Biography of Menaechmus
This University of St. Andrews site contains biographical information on the mathematician Menaechmus.
Math Open Reference
Math Open Reference: Constructions
Learn about drawing shapes using only a compass and straight edge or ruler with out measuring any lengths or angles.
Capital Community College Foundation
Guide to Grammar and Writing: The Ellipsis
Instructional resource providing notes and examples on the rules of using the ellipsis. A quiz link is provided.
Shodor Education Foundation
Shodor Interactivate: Conic Flyer
"This applet allows the user to create graphs of conic sections. Using slider bars, one can manipulate the function to change the constant values and view the effects of those changes."
Texas Instruments
Texas Instruments: Conics
Three Learning Check documents on the various characteristics of parabolas, circles, ellipses, and hyperbolas.
University of Michigan
Virtual Conics
You may have to download first, but the two VRML icons near the bottom of the page allow you to observe the plane intersecting the cone to form the conic. Controls are present to change the angle of the plane and your view of the...
Other
The Ellipse
Good site about the ellipse. The site is very comprehensive and detailed in its explanations
Paul Dawkins
Paul's Online Notes: Algebra: Common Graphs
Students investigate how to graph a wide variety of equations and functions. Topics explored are lines, rational functions, parabolas, ellipses, and transformations. Class notes, definitions, and examples with detailed solutions are...
Grammarly
Grammarly Blog: Ellipsis
This page focuses on the ellipsis including what it is, what it means, how to use it, and examples of its use.
Sophia Learning
Sophia: Omitting Words From Quotations
Notes demonstrating how to correctly write and punctuate a quote when part of the quote has been removed and replaced with an ellipsis. Notes can be read and/or listened to and examples are provided.
Sophia Learning
Sophia: The Ellipsis Mark
This video lesson focuses on the proper use of the ellipsis, including how to type them correctly and how to use them in various types of quotations. [8:57]
Georgia State University
Georgia State University: Hyper Physics: Kepler's Laws
An outstanding page describing Kepler's three laws of planetary motion.
National Council of Teachers of Mathematics
The Math Forum: Analytic Geometry: Polar Coordinates
This site from The Math Forum provides great information on polar coordinates. You can access this information either by clicking on the coordinates link or just scrolling down, it is the first one listed on the page. Includes several...
Lumen Learning
Lumen: Grammar: Punctuation
This instructional activity focuses on the roles of all of the punctuation marks; it provides a video, small practices in various sections, and a punctuation self-check.
Integrated Publishing
Web Algebra: The Ellipse
A lengthy example on how to formulate the equation of an ellipse.