The path of light
This short article uses text and illustrations to explain that light travels in a straight path until it encounters interference.
Author(s): Arizona Collaborative for Excellence in Preparatio

Fraction four
In this two-player online game, students combine math skills and strategies to practice simplifying, converting, and multiplying decimals, percentages, and fractions. For each correct answer, the player places a colored ball on a 10-by-10 grid. The first person to place four balls of his or her color together in a row or diagonally wins. Students can choose different difficulty levels, response time limits, and types of questions. Problems range from simple calculations for reducing fractions to
Author(s): Shodor Education Foundation

Image Tool
This activity allows the user to measure angles and explore the concept of scale as it pertains to maps, images, and drawings.
Author(s): The Shodor Education Foundation, Inc.

Stem-and-Leaf Plotter
This activity generates a stem and leaf plot from data that the user enters.
Author(s): The Shodor Education Foundation, Inc.

Create a Graph
Students will learn how to create area, bar, pie, and line graphs. They are provided with information about what each type of graph shows and what it can be used for. Students are given an example of each type of graph, but they can create graphs using their own data in the interactive tool.
Author(s): National Center for Education Statistics

The SDA Kids Corner
The Soap and Detergent Association Kids Corner features some academic information regarding the history and chemistry of soaps and detergents, recycling plastic cleaning product bottles, environmentally smart ways of using and disposing of cleaning products, facts about environmental issues, and cleaning tips to help reduce the risk of foodborne illness. But what students will find most enjoyable is the section on bubbles. Bubble Recipes, Bubble Magic, The Pop-proof Bubble!, Bubblemania: Bubble
Author(s): Creator not set

Coal mine safety : whose responsibility
This November 28, 2007 entry in the NSDL Expert Voices blog, Connecting News with National Science Education Standards deals with reported increases in coal mine accidents and insufficient government inspections and is related to NSES Personal and Social Perspectives and Science and Technology. Teachers can use this opportunity to discuss with students how politics impacts science, the role consumer demand for coal might play, and what mining engineers do. Additional links to teaching resources
Author(s): Mary LeFever

Who Was Charles Darwin?
In this lesson, students will learn firsthand, by reading his journal entries and letters, how Darwin arrived at his theory. They also will gain a better sense of Darwin's journey and the role it played in his scientific career. In the first activity, Darwin's Great Voyage of Discovery, students will read his account of his voyage on the Beagle and see how this experience inspired him to devote the rest of his life to developing and refining the theory of natural selection. The second activity,
Author(s): Creator not set

This workshop session, part of a free online course developed for elementary and middle school teachers, explores the mean in depth. Participants work together to investigate the mean as the balancing point of a data set and come to understand how to measure variation from the mean. Video segments, interactive practice, problem sets, and discussion questions involve participants in active exploration.
Author(s): WGBH Educational Foundation

Quick take on the wide, wide world of geometry
As the social studies, art, and music classes in the middle school widen students horizons, some of your students may become fascinated with the art, costumes, and customs of other peoples in this and other times. The NCTM Principles and Standards calls for middle school students to be able to recognize and apply geometric ideas and relationships in areas outside the mathematics classroom, such as art, science, and everyday life.
Author(s): NSDL Middle School Portal Staff

Tides and gravity labs
How does gravity cause tides in the oceans? This section, part of an interactive laboratory series for grades 8-12, introduces students to four activities on tides and gravity that cover critical orbital speed between Earth and the moon, gravitational forces between two bodies, tidal effects from the sun and moon, and the change in tidal levels over time. The activities include hands-on animations of concepts whose variables can be manipulated by students. Questions posed to students include ans
Author(s): University of Utah. Astrophysics Science Project I

Science Sampler : The sweet Earth
A great number of geologic processes either take unimaginable lengths of time to complete, or happen in places that cannot be directly observed, such as under the Earth's crust. It is, therefore, necessary for an Earth science teacher to find a connection between students' experiences and the geologic process they are studying to help them better understand that which is often unobservable. One Earth science topic with a tendency to be beyond the reach of direct observation for students is rock
Author(s): Aaron Spurr,Lisa Johnson

Graphing for Area
Middle School, difficulty level 2. Graph six points and find the area of the resulting hexagon.
Author(s): Math Forum,Judy Ann Brown

The future of energy, efficiency
Energy-efficient appliances and vehicles can greatly reduce the amount of energy Americans use. This informational piece, part of a series about the future of energy, introduces students to the consequences of using energy more efficiently. An example about baking a pie provides students with a practical definition of efficiency. A discussion of energy-efficient appliances and processes follows as students read about the Energy Star label. The overall efficiency of a power plant is described, sh
Author(s): Iowa Public Television. Explore More Project

Observe an animation of volcanism at a subduction zone
This Earth science resource features an animation of the volcanic activity that occurs when an oceanic plate subducts under a continental plate. An introductory paragraph provides background information about the events depicted in the animation. These events include the creation and eruption of magma and the formation of volcanic mountains at a subduction zone. Key features such as the asthenosphere are labeled at the beginning of the animation, and arrows indicate the direction of the oceanic
Author(s): TERC. Center for Earth and Space Science Education

Uncertainty in the science of climate change
This November 1, 2007 entry in the NSDL Expert Voices blog Connecting News with National Science Education Standards deals with uncertainty in the science of climate change and how scientists deal with it. Though uncertainty is integral to science, few middle school students recognize that. Teachers can use this opportunity to introduce students to uncertainty in science and how scientists account for it. Additional links to teaching resources related to climate change, the nature of science, an
Author(s): Mary LeFever

Dinosaur
This is a series of experiments about dinosaurs and paleontology that was designed for use in the second grade. Each activity gives the needed materials, what to do, and what to think about. All are designed so the student uses everyday, inexpensive materials and they reinforce information that has already been taught. The Teacher's Notes provide the purpose of the activity, preparation, and notes.
Author(s): D.M. Candelora,The Hands-On Technology Program

Able Sports
This activity focuses on getting students to think about disabilities and how they can make some aspects of life more difficult. The students are asked to pick a disability and design a new kind of sport for it.
Author(s): K-12 Outreach Office,

Conducting a Parametric Dependent Samples t-test (Paired Samples t-test)
John R. Slate, Ana Rojas-LeBouef
Conducting a Parametric Dependent Samples t-test (Paired Samples t-test) is Chapter 5 of Calculating Basic Statistical Procedures in SPSS: A Self-Help and Practical Guide to Preparing Theses, […]
Author(s):
No creator set

Who Can Make the Best Coordinate System?
Students will learn about coordinate systems in general by considering questions concerning what it is that the systems should do, and who decided they would look the way that they look. They will attempt to try and make their own coordinate system using a common area across all groups and compete to see who can make the best one. Students then analyze why it is that some systems work better than others and consider what those observations mean for evaluating and choosing geographic coordinate s
Author(s): University of Houston,