NumberNut
Number Nut: Shapes, Symbols, and Colors: 2 D Shapes
Did you know that two-dimensional shapes are also called polygons? This lesson describes the various 2-D shapes and includes two interactive games to reinforce skills.
![Paul's Online Notes: Algebra Cheat Sheet [Pdf] Activity](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Paul's Online Notes: Algebra Cheat Sheet [Pdf] Activity")
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.
Vernet -Virtual Education Resources Network
Salon Hogar: Referencia Rapida De Formulas Geometricas
This site provides the user with a useful reference to different geometric forms, their elements, formulas, and areas. Entirely in Spanish.
Physics Classroom
The Physics Classroom: Kepler's Second Law
Kepler's second law of planetary motion is stated and explained. An animation of the orbit of a planet and an accompanying graphic assists in explaining the meaning of the law of equal areas.
University of St. Andrews (UK)
University of St. Andrews: Orbits and Gravitation
A page describing the physics, mathematics, and historical figures associated with planetary motion, satellite motion, and universal gravitation.
ClassFlow
Class Flow: Algebra, Geometry Conic Review
[Free Registration/Login Required] Flipchart helps student to interpret algebraic equations and inequalities, geometry (cones, spheres, parabolas, etc.) and describes geometric relationships algebraically.
Wolfram Research
Wolfram Alpha: Conic Sections
The resource consists of a geometry animation that shows conic sections.
Curated OER
Educational Technology Clearinghouse: Clip Art Etc: Admiral Silas H. Stringham
Rear admiral Stringham, born in Middletown, Orange County, N. Y., November 7th, 1798; died in brooklyn, N. Y., February 7th, 1876. He entered the Navy as a midshipman, November 15, 1809, and was in continuous service up to the breaking...
English Plus+
Grammar Slammer: The Ellipsis
This site from Grammar Slammer at English Plus contains information regarding the correct use of the ellipsis. Several examples of the ellipsis in context are provided.
Grammar Tips
Are Those Dots Just for Decoration? Ellipsis Usage
This resource offers a quick explanation of how to use the ellipsis correctly.
History is Fun
Jan Brett: Geometric Shapes Flashcards Pdf
Print out these colorfully illustrated PDF file pages to practice learning your basic two dimensional geometric shapes. Fold them in half and one side shows the shape while the other side shows the shape with the correct name. Put them...
Sophia Learning
Sophia: The Ellipsis Mark: Lesson 4
A screencast introducing an ellipsis and explaining its uses. Followed by a three-question quiz to check for understanding. [4:36]
Sophia Learning
Sophia: The Ellipsis Mark: Lesson 1
A slideshow introduces an ellipsis and explaining its uses. Followed by a three-question quiz to check for understanding.
Sophia Learning
Sophia: Omitting Words From Quotations
This lesson goes over how to alter a quotation by removing word or lines.
Cornell University
Cornell University: Astronomy: Orbital Motion and Kepler's Laws
At this site from the Astronomy Department of Cornell University, Kepler's three laws of planetary motion are stated. There are brief explanations of each, along with links to additional information on related subjects.
Wolfram Research
Wolfram Math World: Semi Major Axis
This site defines semi major axis and has links to related topics.
CK-12 Foundation
Ck 12: Analysis: Functions and Inverses
[Free Registration/Login may be required to access all resource tools.] This lesson covers how to find the inverse of a function. Students examine guided notes, review guided practice and attempt practice problems.
CK-12 Foundation
Ck 12: Analysis: Explicit Formulas
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn about explicit formulas for identifying terms of a sequence without knowing the preceding term. Students examine guided notes, review...
CK-12 Foundation
Ck 12: Elem Math: Matching Equivalent 2 D Shapes
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to match a given shape with those that are equivalent or the same type. Includes video demonstrating a sample problem...
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