Students learn about the concepts of accuracy and approximation as they pertain to robotics, gain insight into experimental accuracy, and learn how and when to estimate values that they measure. Students also explore sources of error stemming from the robot setup and rounding numbers.

The Apache Crown Dancers are enrolled members of the White Mountain Apache Tribe and live in Whiteriver, Ariz. In this video segment, the group leader, Joe Tohonnie, Jr., talks about the long history of the dance and its role in Apache culture as the dancers perform Crown Dances.

Joe Allred, leader of the Lexington, KY.-based Capoeira Narahari, discusses the basics of Capoeira and its origins in Brazil in this video from the Dance Arts Toolkit series.

In this video John Bullet Standingdeer a member of the Warriors of AniKituhwa of Cherokee, NC, describes the cultural importance of the ceremonial Eagle Dance, performed by the Warriors of AniKituhwa, and the social Beaver Dance, performed by the Raven Rock Dancers.

CropWatch is a central resource for University of Nebraska–Lincoln Extension information on crop production and pest management. It is written by Extension Educators and Specialists and produced by IANR Media in the UNL Institute of Agriculture and Natural Resources.

Information is organized into two key areas, each of which offers thousands of crop-specific articles for Nebraska producers and crop consultants:

The CropWatch newsletter, which includes timely articles published to the site's home page. New issues are published weekly during the heart of the crop production season and generally biweekly during the remainder of the year. Older articles are archived for later review.

CropWatch also includes:

- Calendar of ag events and programs
- Daily news and updates via Twitter at UNL_CropWatch (also displayed on the home page)
- Ag decision-aid tools and resources from UNL Extension
- Content tags at the end of individual stories to help you located related articles released since April 2016.
- Use the Search box in the top right of every page or the Archives to locate additional articles.
- Crop-specific production and pest management sections, with additional sites for whole farm and production systems. Use the top red-bar navigation to access specific crop, management and related topics.

Middle and High School educators across Lebanon County, Pennsylvania developed lesson plans to integrate the Pennsylvania Career Education and Work Standards with the content they teach. This work was made possible through a partnership between the South Central PA Workforce Investment Board (SCPa Works) and Lancaster-Lebanon Intermediate Unit 13 (IU13) and was funded by a Teacher in the Workplace Grant Award from the Pennsylvania Department of Labor and Industry. This lesson plan was developed by one of the talented educators who participated in this project during the 2019-2020 school year.

Curtis Lazore, a member of the Oknegakdagye (Along the Waters) Dancers, talks about the dance traditions of the Mohawk in this video from the Dance Arts Toolkit series.

Tamisha Floyd, one of four captains of the Step Team at Bryan Station High School in Lexington, Ky., describes stepping in this video from the Dance Arts Toolkit series. She also describes how her team learns and practices its routines.

Dancer Lakshmi Sriraman talks about the bharatanatyam, a classical dance from India in this video from the Dance Arts Toolkit series.

Cheryl Pan, a dancer from China, talks about the Chinese fan dance and shows a variety of fans used in Chinese dances in this video from the Dance Arts Toolkit series.

Jingzian Zhang, a retired professor of Chinese opera, talks about the purpose and form of the Chinese Sword Dance in this video from the Dance Arts Toolkit series.

Jeaunita and Adebola Olowe of Bi-Okoto Drum & Dance Theatre talk about the Sohu, a ritual cleansing dance from Togo, in this video from the Dance Arts Toolkit series.

Jennifer Rose, a dancer, musician, and folk historian from Berea, Ky., talks about the background of the Tarantella, in this video from the Dance Arts Toolkit series. The Tarantella is a folk dance that originated in Italy.

Adebola and Jeaunita Olowe discuss Nigerian culture and dance and how they started an African dance company in the United States in this video from the Dance Arts Toolkit series.

At this point in the unit, students have learned about Pascal's law, Archimedes' principle, Bernoulli's principle, and why above-ground storage tanks are of major concern in the Houston Ship Channel and other coastal areas. In this culminating activity, student groups act as engineering design teams to derive equations to determine the stability of specific above-ground storage tank scenarios with given tank specifications and liquid contents. With their floatation analyses completed and the stability determined, students analyze the tank stability in specific storm conditions. Then, teams are challenged to come up with improved storage tank designs to make them less vulnerable to uplift, displacement and buckling in storm conditions. Teams present their analyses and design ideas in short class presentations.

The purpose of this task is to help students interpret signed numbers in a context as a magnitude and a direction and to make sense of the absolute value of a signed number as its magnitude.

This video segment adapted from First Light explains why the highest peak in the Pacific, Mauna Kea, is an ideal site for astronomical observations. Featured are new telescope technologies that allow astronomers to explore the universe in more depth.

Students will be able to analyze two theatrical movie trailers for movies pertaining to the life of Abraham Lincoln, identifying factual and dramatized components and attempt to find connections between the two trailers.

In this 6-part activity, students learn about climate change during the Cenozoic and the abrupt changes at the Cretaceous/Paleogene boundary (65.5 million years ago), the Eocene/Oligocene boundary (33.9 million years ago), and the Paleocene/Eocene boundary (55.8 million years ago).

In this activity, students work with paleoclimate proxy data (d18O, CH4, CO2)from the Byrd and GISP2 ice cores to investigate millennial-scale climate changes during the Last Glacial/Deglacial time periods. Students must prepare a publication quality plot of the data and answer several questions about the similarities and differences between the time-series (north-south phasing, amplitude, symmetry) and use this information to assess the bipolar see-saw mechanism for abrupt climate changes. Students are encouraged to read two journal articles for more information and to synthesize their results with other information from lectures and earlier readings.

(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)