Teaching proof in a dynamic geometry environment: what mediation?
This paper aims to discuss two issues. First we intend to analyse if and how dynamic geometry software prove to be a communication space for students and how they support students towards proving. Second, we reflect about the use of video-tapes as source of information both for Mathematics Education research and for the teaching practice. In particular we approach the question: how do video-tapes help in the construction of a shared experience in the classroom?
Kinue Snookes, Lecturer in Japanese at the University of Worcester, recaps the main points learnt during one of her lectures in a slide show with audio commentary
Congress, Law, and Politics
This site presents papers of members of Congress, Supreme Court justices, and key federal law cases. Learn about the Revolution and the creation of the U.S. by investigating the papers of our earliest lawmakers -- Jefferson, Madison, Monroe, and others. See Calhoun's speech against the Compromise of 1850 and Webster's notes for his speech in favor of it, General MacArthur's Old Soldiers Never Die address to Congress (April 1951), and more.
Portrait of Aaron Wolfsohn (or Wolfsohn-Alle), Rabbi of Hildesheim Area (Hannover) 1754-1835.
Shown full-face wearing prayer shawl over rabbinical dress and side locks. Wolfsohn, a writer of the Haskalah, published in Hebrew, Yiddish and German.,Shown full-face wearing prayer shawl over rabbinical dress and side locks. Wolfsohn, a writer of the Haskalah, published in Hebrew, Yiddish and German.
Table of volcano interferograms
Table of potentially active volcanoes in the central Andes with links to interferograms of each.
Simon of Trent / "Judensau".
top: corpse of Simon of Trent.,Bottom: hog, devil and other figures based on a traditional German anti-Semitic image, said to go back to the Middle ages, such as the 15th. cent. design on the bridge at Frankfurt, the "Judensau" (illustrated as the frontpiece of J.Trachtenberg's The Devil and the Jews). Text in German.,top: corpse of Simon of Trent.,Bottom: hog, devil and other figures based on a traditional German anti-Semitic image, said to go back to the Middle ages, such as the 15th. cent. de
Terezin: Work Brigade 1943.
Perspective view of a group of marching men wearing stars of David. Some of them a carrying picks, They are highly individualized.,signed and dated 11.9.43 lower left.,Perspective view of a group of marching men wearing stars of David. Some of them a carrying picks, They are highly individualized.,signed and dated 11.9.43 lower left.,Born in Czechoslovakia. In 1937, his works were designated as "degenerate art" and he was accused of cultural Bolshevism because of the caricatures he had published
Landscape. A view from outside the Wall, pencil tinted with watercolor. Signed lower right and dated 4.8.35,Landscape. A view from outside the Wall, pencil tinted with watercolor. Signed lower right and dated 4.8.35
Rothschild is enthroned on piles of moneybags in the various denominations of European coins, with the crowned heads of state, a priest and the poor kneeling at his feet.,Rothschild is enthroned on piles of moneybags in the various denominations of European coins, with the crowned heads of state, a priest and the poor kneeling at his feet.
This tool aids in investigating relationships between interacting data elements or data clusters analysis in genetic mapping and in competition between different groups of organisms and their resource requirements.
Recognition of the Soviet Union; Pittsburgh Politics;Joe Stalin; Franklin Roosevelt; Soviet-German Pact; Soviet Union;McKeesport flyer justifying the Soviet Union's change in policy following the Non-Aggression Pact.
Internet Scout Project
The "Earth Observing System (EOS) Aura is a NASA mission to study the Earth's ozone, air quality, and climate" by researching the composition, chemistry, and dynamics of the Earth's atmosphere. Visitors can learn how Aura is investigating three questions: Is the Earth's ozone layer recovering? Is air quality getting worse? How is Earth's climate changing? Researchers can find extensive details about the flight, spacecraft devices and specifications, and the data processing and validation. Visito
Old Union Wagon (page 4)
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Encylcopedia of Laser Physics and Technology
This is a comprehensive encyclopedia that provides a brief definition or explanation of a keyword term or principle of laser physics and technology. The site is organized so that one can click on an alphabet letter to get a listing of keywords or terms for searching. This site will be useful for novices in the field and anyone who needs a refresher or reminder of terms and definitions. Most useful to upper division undergrads, graduate students and practitioners who need to learn terms to naviga
Middle School Portal: Math and Science Pathways (MSP2)
This challenge asks students to determine possible ways for combining stamps costing 15 and 33 cents to total 1 dollar 77 cents. It notes that this type of problem is similar to a process used for creating security codes. This online student activity is part of the Figure This! collection of 80 mathematical challenges. Students are encouraged to make a chart as they explore possible number combinations. The answer page describes and illustrates four different approaches to finding the solution,
Guidelines for Teaching Middle and High School Students to Read and Write Well
Most classroom teachers work hard planning lessons, choosing materials, teaching classes, working with individual students, and assessing student progress. Yet some schools and teachers seem to be more successful than others. What makes the difference? This booklet is designed for middle and high school teachers and administrators who wish to improve their English programs. Guidelines for Teaching Middle and High School Students to Read and Write Well draw upon a series of research reports and c
Portrait of Berthold Auerbach ( 1812-1882 ).
Bust of the novelist and essayist, who devoted much time to the cause of emancipation.,Bust of the novelist and essayist, who devoted much time to the cause of emancipation.
Portrait of Ernst Toller (1893-1939).
Signed by Stumpp and Toller.,Signed by Stumpp and Toller.,German playwright and Socialist activist, Toller participated in the Communist government after World War I and in the Spanish civil war. He commited suicide in New York.
Morphological variation of the proximal femur in selected skeletal remains
The purpose of this thesis is to examine the structural variation of the proximal femur in human skeletal samples. The goal was to investigate and further describe the morphology of the proximal femur through quantitative observation. Subsets of measurements were used to calculate platymeric indices, which demonstrate the presence or absence of platymeria in a population. Metric analyses of the femur were also used to study size and shape differences in populations for indications of sexual dimo
Reassessment of intra- and extra-ovarian expression of growth differentiation factor-9
Mammalian ovarian organogenesis is characterized temporally by oogonial mitosis, oogonial apoptosis, rescue of germ cells via interaction with somatic cells to form primordial follicles, and entrance into meiosis. Recent studies suggest that germ cell’s activity participate in this process via the production of local regulatory factors. Growth differentiation factor-9 (GDF-9), a novel transforming growth factor-family member, is expressed in ovaries of various species as a crucial factor in ov