CK-12 Foundation
Ck 12: Geometry: Basic Geometric Definitions
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to the basic principles and definitions of geometry, including points, lines and planes. tudents examine guided notes, review guided...
Math Open Reference
Math Open Reference: Points and Lines
A complete reference guide to points, lines, and planes. It provides definitions and interactive activities that enhance further explanation.
PBS
Pbs Nature: Ray
The word "manta" means blanket in Spanish--and the Manta ray gets its name from its blanketlike appearance in the water. Learn all about their life cycle and habitat in text and pictures.
Alabama Learning Exchange
Alex: Geometric Man
The learners will explore angles, rays, line segments, perpendicular lines, parallel lines, and two-dimensional figures through the use of the book Shape Up! Fun With Triangles and Other Polygons by David A. Adler. They will also...
Georgia Aquarium
Georgia Aquarium: Bowmouth Guitarfish
Use this animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical, and other unique characteristics of the Bowmouth Guitarfish. They can be viewed live on the webcam.
Georgia Aquarium
Georgia Aquarium: Spotted Eagle Ray
Use this comprehensive animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical, and unique characteristics of the Spotted Eagle Ray.
Georgia Aquarium
Georgia Aquarium: Cownose Ray
Use this comprehensive animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical, and unique characteristics of the Cownose Ray.
Georgia Aquarium
Georgia Aquarium: Manta Ray
Use this animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical and unique characteristics of the manta ray. They can be viewed live on the webcam.
Georgia Aquarium
Georgia Aquarium: Giant Guitarfish
Use this animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical and unique characteristics of the Giant Guitarfish. They can be viewed live on the webcam.
Georgia Aquarium
Georgia Aquarium: Lesser Devil Ray
Use this comprehensive animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical, and unique characteristics of the Lesser Devil Ray.
Georgia Aquarium
Georgia Aquarium: Longcomb Sawfish
Use this animal guide to learn the scientific name and discover the habitat, diet, reproduction, physical and unique characteristics of the longcomb sawfish. It can be viewed live on the webcam.
OER Commons
Oer Commons: Four Types of Angles
In this lesson, students learn about four types of angles: adjacent, vertical, supplementary, and complementary. They explore the relationships between these types of angles by folding paper, measuring angles with a protractor, and...
Curated OER
Ray Optics, Light Reflection
Site provides a diagram as well as a scientific explanation of light reflection. Includes links to ray optics, light and physics.
California Academy of Sciences
California Academy of Sciences: Echinoderm Webpage
Resource provides a brief overview of echinoderms. Includes pictures and links for more information.
University of California
Ucmp: Introduction to Chondrostei
Chondrostei is a mostly forgotten group of cartilaginous fish which deserves at least one page, and here it is. Good information on a cartilagnous fish.
Other
Elasmo: Lee Creek Fauna
A list of some representative Rays and Skates found in the fossil record of a particular area. A good look at the body form of a number of these animals.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Lines, Segments, and Rays
Find a quick, concise explanation of rays, lines and line segments. Examples are given and clearly explained for each.
ClassFlow
Class Flow: Vectors Algebra
[Free Registration/Login Required] Students use the interactive features of Activstudio to identify and label one and two dimensional characteristics. Students explore rays, lines, end points, line segments, vertices, and angles.
ClassFlow
Class Flow: Electromagnetic Spectrum
[Free Registration/Login Required] In this Flipchart, students are introduced to the electromagnetic spectrum. Students will learn the names of the types of waves, and the order in which they are arranged. Additionally, students will...
ClassFlow
Class Flow: Lines, Rays, Line Segments
[Free Registration/Login Required] This lesson is an introduction to the basic geometric figures: lines, rays, and line segments. The definition and naming conventions for each figure are explained. An assessment section follows.
Unique Australian Animals
Unique Australian Animals: Sawfish
Use this site to learn more about the Sawfish with this brief description and images.
Kidport
Kidport: Light
Did you know that light is a form of energy and always travels in a straight line? Discover some more interesting facts about light.
Quia
Ixl Learning: What Is an Angle?
Brush up on your math skills relating to what is an angle then try some practice problems to test your understanding.