National Council of Teachers of Mathematics
Nctm: Illuminations: Visualizing Transformations
Choose a transformation and apply it to a shape to observe the resulting image.
Math Open Reference
Math Open Reference: Similar Triangles
Learn about similar triangles with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Khan Academy
Khan Academy: Reflecting Points in the Coordinate Plane
Practice reflecting points across axes on the xy coordinate plane.
Math Open Reference
Math Open Reference: Congruent Polygons
Learn about congruent polygons with this resource which offers detailed explanations, examples, and an interactive. Subjects covered include how to test for congruence. Links to related topics.
Khan Academy
Khan Academy: Determine Reflections (Advanced)
Given two figures on the coordinate plane, draw the line of reflection that takes one figure to another.
Cuemath
Cuemath: Transformation of Functions
In this mini-lesson, we will learn about transformations of functions, transformations of exponential functions, and transformations of quadratic functions. Check out the interactive simulations to know more about the lesson and try your...
CK-12 Foundation
Ck 12: Interactive Geometry: 8.1 Circles and Similarity
Learn how similarity transformation is one or more rigid transformations (reflection, rotation, translation) followed by a dilation.
CK-12 Foundation
Ck 12: Interactive Geometry: 2.10 Composite Transformation
See examples of transformations including a translation and a reflection.
PBS
Pbs Learning Media: Math + Arts: Rotation, Reflection, and Translation in Dance
In this lesson, students choreograph a dance figure by creating a dance graph with descriptions of rotation, reflection, and translation; perform it for their classmates; and translate a classmate's dance map into a performance. Media...
Other
Nearpod: Transformations on Coordinate Planes
In this lesson on transformations on coordinate planes, 8th graders explore dilation, translation, reflection, and rotation of shapes within a coordinate plane.
E-learning for Kids
E Learning for Kids: Math: Living in the Mill: 2 D Shapes
Students can use this interactive site to practice various geometric concepts such as rotations, reflections, translations, tesselations and geometric patterns.
Science U
Science U: Isometries: Reflection
This site from Science U gives a good example of reflection of symmetry. It also gives some background information about reflection as well.
Boston University
Bu: Optics: Geometric Optics
Several short descriptions of demonstrations which illustrate principles of geometric optics (many of which focus upon refraction).
Georgia State University
Georgia State University: Hyper Physics: Reflection and Refraction
Reflection and refraction are explained with an experiment that uses a sheet of paper, cardboard, and other common materials.
Cosmo Learning
Cosmo Learning: Physics Iii: Vibrations and Waves
A collection of video lectures from a physics course focusing on vibration and waves taught at the Massachusetts Institute of Technology. The course overviews topics dealing with mechanical vibration and waves with twenty-three lectures....
Pennsylvania State University
Penn State Graduate Program in Acoustics: Reflection From Mirrors
Included here are illustrations of reflections from a plane mirror, a concave mirror and a convex mirror.
National Council of Teachers of Mathematics
The Math Forum: Multicultural Math Fair: Sonya's Symmetry
Straightforward lesson designed to introduce students to symmetry and reflection using MIRA mirrors. Includes two worksheets--instructions and activities are available in English and Spanish.
National Council of Teachers of Mathematics
The Math Forum: Multicultural Math Fair: Navajo Burntwater Designs
Simple instructional activity designed to help students learn the geometric concepts of translation, reflection, and symmetry by creating Navajo weaving patterns. Includes templates and instructions and is available in English and...
University of Regina (Canada)
University of Regina: Math Central: Symmetry and Translations
This University of Regina site gives some history and definitions about translations and symmetry.
University of Maryland
University of Maryland: Thinking Problems With Sound
A series of thought-provoking multiple-choice questions from the University of Maryland on the topic of sound and acoustics. One question pertains to the acoustics of a furnished room with two speakers; demands a basic understanding of...
York University
The Joy of Visual Perception: Physics of Visual Stimulus
From an online "book," this particular page describes physics principles related to vision and sight. Keywords are linked to other pages with further information. The role of sunglasses in blocking glare is discussed and explained. A...
Wolfram Research
Wolfram Science World: Fresnel, Augustin
This site from ScienceWorld provides a short biographical sketch of Augustin Fresnel (1788-1827 CE) and describes his most notable scientific discoveries and contributions. Links are provided throughout for additional information.
NumberNut
Number Nut: Light and Colors
Discover the relationship between light and colors in this brief lesson. Links to related color identification activities, Color Memory Challenge and Identifying Colors Quiz. Immediate feedback given to responses that includes...
Math Is Fun
Math Is Fun: Reflection
Students learn about reflection. An activity, examples, tricks, and a definition are included.