Details on how to make a simple tap wrench with some theory on thread cutting.
Sample Axonometric (Isometric) Projections
Useful Fact-sheet explaining the relationship between the orthographic views and the axonometric views.
"I Was Not Wanted Any Longer": A Retail Worker Joins the Union in 1914 and Gets Fired
Employers had many ways to retaliate against their workers who tried to organize, ranging from allies in state and local police forces to detective agencies that used secret operatives to disrupt unions and supplied thugs to protect strikebreakers during strikes. But the simplest expedient available was to simply fire employees who were perceived as potential troublemakers. In 1914, a former department store worker named Sylvia Schulman testified before the U. S. Commission on Industrial Relatio
"We Ran Silent Movies For Years": An Italian Immigrant Goes Into Show Business in the Early 20th cen
The advent of "talkies"in the early 20th century had an impact felt far from Hollywood. Immigrants made up a significant portion of the movie-going audience during the silent film era because the lack of (English) speech beckoned immigrants unable to comprehend the many facets of American life: a picture that didn't talk was particularly appealing to people who didn't speak or read English. In this oral history, recorded by Roy Rosenzweig in 1978, Italian immigrant Fred Fedeli recalled his exper
"I Started Filling Rifles": A Woman Strike Supporter Remembers the 1914 Ludlow Massacre
The brutal southern Colorado coal strike reached its nadir on Easter night, 1914, with the horrendous deaths by fire of three women and eleven children at the hands of the Colorado state militia. Mary Thomas, whose husband was on strike, was interviewed at age eighty eight by historian Sherna Gluck in 1974 for the Feminist History Research Project. Thomas vividly recalled the horror of the infamous Ludlow Massacre, described her efforts to save the lives of women and children by hiding them in a
The High Plains: Land of Extremes
This website is dedicated to the High Plains: Land of Extremes Exercise. This exercise covers the physical features of the High Plains (or Great Plains), the grasses and plants of the area, prairie dog ecosystems, riparian areas, mining, management, water resources, and fire cycles. Student activities are based on the study of groundwater movement, energy resources, wind energy, and riparian areas. A debate allows students to understand the viewpoints of different interest groups in considering
Lessons in Technology
Rutgers School of Engineering provides numerous laboratory and lessons for grades 5-8. Lessons fall into three categories Civil and Environmental Engineering, Biocomplexity and Biocomplexity and Microorganisms. Some lessons include objectives, standards, materials and other relevant information. Laboratories are well described and can be easily adjusted for higher grade levels.
The Moon Phases java applet provides an animated view of the moon, either from Earth, or from above the ecliptic. The animation changes phases and can be seen from a top view, earth view or both. The page also provides vocabulary terms for each of the phases and other interesting information.
"Adopt an Outcrop"
In this lab, each student or small student group "adopts" a different outcrop or road cut, describing and interpreting both the outcrop scale features and hand specimens. This website provides a context for the use of this lab, and describes learning goals, teaching notes and assessment. It also includes downloadable handouts and other teaching materials.
In this Starting Point case study, students will explore wetland hydrology and biology. They will decide whether or not to restore a wetland or retain dams and drainage systems. Students will also examine the complexity of decisions regarding wetland restoration as well as investigate viewpoints of various stakeholders in the draining of wetlands. While the activity is set in Missouri, the case can apply to any wetland conservation or restoration project. Users can access information regarding l
Every Picture Tells a Story: K-4
These activities are designed to create a sense of disequilibrium in the visual perception of students to make them aware of different ways to to view a picture. The students will view the images, decide what they see in each, record their ideas, and write a story based upon these findings.
Robotics with the XBC Controller
This course offers a brief history of robotics, and a definition of robot and robotics. The course includes an introduction to IC and the XBC, downloading firmware, Updating the bitstream, and IC Environment and simulator. It concludes with an activity building a Demo-Bot.
Who Can Live Here? Life in Extreme Environments
Astrobiology in the Classroom leads students in the exploration of the limits of life on Earth to extend their beliefs about life to include its possibility on other worlds. In this four-part activity, students first explore the environments of several mammals and birds to better understand how living things and their environments interact and depend on each other. In the second part, students match bacterial types with their more extreme environments. Students discover that an environment's tem
This is a community of teachers and students who help to create online resources for teaching Latin and ancient Roman culture and who use these resources in their courses. Students and instructors can interact live and share resources for the study of the ancient world.
Carex communis habit
Carex communis habit. For context, see: Carex communis species page and Carex Interactive Identification Key.
River Systems: Process and Form
This site provides access to a number of visual resources and supporting material about physical processes acting in rivers and floodplains. Visualizations include simple animations, visual output from numerical models, sediment transfer movies, and numerous static illustrations and photos. Resources can be integrated into lectures, labs, classes, or other activities about fluvial processes and landscape evolution over time.
Crystal Morphology, Crystal Symmetry, Crystallographic Axes
This site is a lecture from Tulane University that explores the symmetry observed in crystals. Topics covered include crystallographic axes, the crystal lattice, and unit cells. Tables and illustrations accompany the text.
The Atmosphere And Its Relation To The Crust And Hydrosphere
This site provides an illustrated lecture from a geochemistry course offered by Dr. Scott Wood at the University of Idaho. Topics include a review of the structure and formation of the Earth's crust, atmosphere, and hydrological cycle, and the composition of the atmosphere. Additional topics covered are the concept of residence time, geological and biological sources of components in the atmosphere, acid-base theory, Henry's law and the solubility of gases in water, primary and secondary air pol
Waterfall Formation and Nick Point Migration
This site provides a variety of visual resources about waterfalls. Flash animations show how waterfalls, plunge pools and gorges are created by the erosion of underlying rock by flowing water. A QuickTime movie gives examples of large-scale waterfalls from around the world, and an interactive diagram illustrates how falling water is used to generate hydroelectric power. These resources are suitable for integration into lectures, labs, or other activities.
Cause of Seasons Animations
This site features Flash, QuickTime, and GIF animations that illustrate the cause of seasons, how seasons impact the sun's apparent path across the Earth's sky, the subsolar point, and the circle of illumination. The animations can be paused and rewound to stress important points. These resources are suitable for use in lectures, labs, or other teaching activities.