CK-12 Foundation
Ck 12: Geometry: Composition of Transformations
[Free Registration/Login may be required to access all resource tools.] In this lesson students compose a series of transformations. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...
University of Colorado
University of Colorado: Fitzgerald Lorentz Contraction
This page is plenty fascinating and detailed. Done by a space scientist at the University of Colorado, it provides neat animations and not enough text. Explore particularly the Space-Time Wheel.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: The Concept of Congruence
A guide to support parents as they work with their students in the concept of congruence.
Other
Atoms in Motion: Atoms and Ions
All matter is made of atoms! And atoms are made of even smaller more fundamental particles. Atoms are not shiny little rigid spheres as we depict in drawings and simulations; they're more like a squishy storm of tiny particles swirling...
Other
All About Vision: Controlling Myopia With Contact Lenses
Information about rigid gas permeable (RGP) contact lenses as a treatment for myopia, and children who can wear them.
Science U
Science U: Isometries: Rotation
This site from Science U gives good examples of rotational symmetry and some background information about them.
Other
Warmair.com: Insulation
The role of insulation in preventing heat loss is discussed. The concept of thermal resistance is introduced and explained. Understandable language but no graphics.
CK-12 Foundation
Ck 12: Geometry: Composition of Transformations Study Guide
This study guide on the composition of transformations covers some vocabulary terms and different types of these compositions. It is available for download with free registration.
Khan Academy
Khan Academy: Intro to Rotations
Explains how to perform a rotation using an interactive tool and presents problems to try. Includes a video example. [1:25] Hints are available for the problems.