This task builds on a fifth grade fraction multiplication task and uses the identical context, but asks the corresponding ŇNumber of Groups UnknownÓ division problem.

The course provides the technological background of treatment processes applied for production of drinking water. Treatment processes are demonstrated with laboratory experiments.

This course deals with the design of drinking water treatment plants. We discuss theory and design exercises.

Students use a sponge and water model to explore the concept of relative humidity and create a percent scale.

Worksheet on drug resistance in bacteria, to accompany Nina Parker's Microbiology textbook, available on Open Stax.

This class examines the relationship between a number of mind-altering substances and cultural processes. We look at the relationship between drugs and such phenomena as poverty, religion, technology, inter-generational conflict, colonialism, and global capitalism. We read about the physiological and psychological effects of these substances -- ranging from alcohol to LSD, cocaine and ecstasy -- and ask why different societies prohibit and sanction different drugs. We examine the use of mind-altering substances in a number of "traditional" societies, and follow the development of a global trade in such substances as sugar, coffee, tea, nicotine, cocaine, and marijuana concurrent with the evolution of global capitalism. We look at the use of LSD as a mind-control substance by the CIA and as a mind-altering substance in the 1960's counter-culture, and we look at the rise of Prozacĺ¨ and Viagraĺ¨ as popular, if controversial, pharmaceutical products in recent years. Finally, we evaluate America's current drug laws.

The Course book presents the basics of drugs quality control in accordance with regulatory documents (pharmacopoeia of Europe, USA, Japan, Russia) and new data from current scientific periodicals, monographs The features of the physical, spectral and chemical quality control of medicines according to the indicators «identification», «tests» and «assay» are described in detail. Part II presents a workbook, which includes questions for the self-control of the material studied and tasks for a laboratory workshop. The Course book contains reference material and samples of pharmacopoeial articles. The Course book is designed for students of the specialty «Pharmacy».

Student teams commit to a final decision on the location they recommend for safe underground cavern shelter for the citizens of Alabraska. They prepare and deliver final presentations to defend their final decisions to the class.

This art history video discussion examines Duccio's "The Rucellai Madonna", 1285-86, tempera on panel, 177 x 114" or 450 x 290 cm (Uffizi, Florence).

This art history video discussion examines Duccio di Buoninsegna, Madonna and Child, tempera and gold on panel, c. 1300 (Metropolitan Museum of Art).

This art history video discussion examines Duccio's "Maesta" (back view), 1308-11 (Museo dell'Opera Metropolitana del Duomo, Siena).

This art history video discussion examines Duccio's "Maesta" (front view), 1308-11 (Museo dell'Opera Metropolitana del Duomo, Siena).

This art history video discussion examines Duccio di Buoninsegna's "The Virgin and Child with Saints Dominic and Aurea", c. 1315, tempera on wood, 42.5 x 34.5 cm (National Gallery, London).

This art history video discussion examines Marcel Duchamp's "Boite-en-valise (the red box)", series F, 1960 (Portland Art Museum).

This art history video discussion looks at Marcel Duchamp's "Fountain" (1917/1964). Porcelain urinal, paint (San Francisco Museum of Modern Art).

This art history video discussion examines Albrecht Dürer's prints: "Four Horsemen of the Apocalypse" (ca. 1497–98) and "St. Jerome in his Study" (1514).

This art history video discussion examines Albrecht Dürer's "Self-portrait", 1498, oil on panel, 52 x 41 cm (Museo Nacional del Prado, Madrid).

This art history video discussion examines Albrecht Durer's "The Large Piece of Turf", 1503, watercolor and gouache on paper, 16-1/8 x 12-5/8 inches / 41 x 32 cm (Graphische Sammlung Albertina, Vienna)

This art history video dicussion examines William Dyce's "Pegwell Bay, Kent - a Recollection of October 5th 1858" 1858-60, oil on canvas (Tate Britain, London).

Students experiment with various ways to naturally dye materials using sources found in nature—roots, leaves, seeds, spices, etc.—as well as the method of extracting dyes. Then they analyze various materials using statistical methods and tackle an engineering design challenge—to find dyes that best suit the needs of a startup sustainable clothing company.