This art history video discussion looks at Raphael's "School of Athens", fresco, 1509-1511 (Stanza della Segnatura, Papal Palace, Vatican).

This short work of fiction has been one of Johnson’s most popular and widely-read since its first, anonymous publication in 1759. It has been reprinted again and again over the last two and a half centuries. It seems a fair guess that over that time more people have read this book than have read any of Johnson’s other works, with the possible exception of the Dictionary of the English Language (1755); even there, very few will have read the Dictionary from cover to cover in the way that readers are invited to enjoy this short and very readable work. Originally called by Johnson “The Choice of Life,” it was first published as The Prince of Abissinia. Today, this book is better known as Rasselas; the evolution of the title is a story of its own, which will be discussed later in this introduction.

Play with the left and right hands in different ways, and explore ratio and proportion. Start on the Discover screen to find each challenge ratio by moving the hands. Then, on the Create screen, set your own challenge ratios. Once you've found a challenge ratio, try to move both hands while maintaining the challenge ratio through proportional reasoning.

The scope of this video lesson consists in studying the sets of Rational and Irrational numbers. It is best suited for an advanced math course: Algebra 2 or higher.

This task makes for a good follow-up task on rational irrational numbers after that the students have been acquainted with some of the more basic properties. In addition to eliciting several different types of reasoning, the task requires students to rewrite radical expressions in which the radicand is divisible by a perfect square (N-RN.2).

In some textbooks, a distinction is made between a ratio, which is assumed to have a common unit for both quantities, and a rate, which is defined to be a quotient of two quantities with different units (e.g. a ratio of the number of miles to the number of hours). No such distinction is made in the common core and hence, the two quantities in a ratio may or may not have a common unit. However, when there is a common unit, as in this problem, it is possible to add the two quantities and then find the ratio of each quantity with respect to the whole (often described as a part-whole relationship).

This art history video discussion looks at Raymond Duchamp-Villon's "Horse" 1914, bronze (Art Institute of Chicago).

Create your own sandwich and then see how many sandwiches you can make with different amounts of ingredients. Do the same with chemical reactions. See how many products you can make with different amounts of reactants. Play a game to test your understanding of reactants, products and leftovers. Can you get a perfect score on each level?

Students investigate the endothermic reaction involving citric acid, sodium bicarbonate and water to produce carbon dioxide, water and sodium citrate. In the presence of water [H2O], citric acid [C6H8O7] and sodium bicarbonate [NaHCO3] (also known as baking soda) react to form sodium citrate [Na3C6H5O7], water [H2O], and carbon dioxide [CO2]. Students test a stoichiometric version of the reaction followed by testing various perturbations on the stoichiometric version in which each reactant (citric acid, sodium bicarbonate, and water) is strategically doubled or halved to create a matrix of the effect on the reaction. By analyzing the test matrix data, they determine the optimum quantities to use in their own production companies to minimize material cost and maximize CO2 production. They use their test data to "scale-up" the system from a quart-sized ziplock bag to a reaction tank equal to the volume of their classroom. They collect data on reaction temperature and CO2 production.

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

This short video and interactive assessment activity is designed to teach third graders an overview of schedules and timelines.

This short video and interactive assessment activity is designed to give fourth graders an overview of schedules and timelines.

This short video and interactive assessment activity is designed to teach second graders an overview of schedules and timelines.

This course explores the form, content, and historical context of various works of fiction specifically through the thematic lens of "dysfunctional families." We will focus primarily on questions pertaining to the structure, language, story, and characters of these fictional works.

In this activity, students are guided through a close reading of The Journal of Sean Sullivan: A Transcontinental Railroad Worker, a fictional book for young readers based on historical sources. Students will read a short excerpt from the beginning of the book and determine the meaning of key words. Working in groups, students will then read excerpts related to one of the following themes: working conditions of railroad builders; tension between immigrant groups; corruption of the railroad companies; conflict with Great Plains Indian tribes; and boomtowns. They will also complete an individual writing task on their theme. Finally, students will consider the positive and negative effects of the railroad on the country as a whole, as well as on specific groups of Americans.

Kids find and read news in lots of different ways. But studies show they're not very good at interpreting what they see. How can we help them get better? Teaching your students about the structure of online news articles is an important place to start.

Reading Poetry" has several aims: primarily, to increase the ways you can become more engaged and curious readers of poetry; to increase your confidence as writers thinking about literary texts; and to provide you with the language for literary description. The course is not designed as a historical survey course but rather as an introductory approach to poetry from various directions -- as public or private utterances; as arranged imaginative shapes; and as psychological worlds, for example. One perspective offered is that poetry offers intellectual, moral and linguistic pleasures as well as difficulties to our private lives as readers and to our public lives as writers. Expect to hear and read poems aloud and to memorize lines; the class format will be group discussion, occasional lecture."

How do you read a poem? Intuition is not the only answer. In this class, we will investigate some of the formal tools poets use—meter, sound, syntax, word-choice, and other properties of language—as well as exploring a range of approaches to reading poetry, from the old (memorization and reading out loud) to the new (digitally enabled visualization and annotation). We will use readings available online via the generosity of the Poetry Foundation and the Academy of American Poets. We will also think collectively about how to approach difficult poems.

Untangling the various approaches to language teaching and their history, Gerdi Quist maps recent thinking in language studies at university. Using an interdisciplinary theoretical framework, drawn from educational philosophy, cultural studies, intercultural studies and language pedagogy, the author discusses the many tensions and currents in contemporary language teaching. The author puts forward an alternative pedagogy, that of a cultuurtekst-perspective, which engages learners at complex linguistic and cultural levels. In discussing the case study in which this approach is tested, the author develops her argument for embracing various critical perspectives through the personal engagement of students. From the start the author acknowledges her own engaged position as a language teacher in a liberal humanistic educational environment. She adopts a self -critical perspective through which her engagement with adverse student reaction leads to deepening insights both for the author and her students as part of the non-linear process of learning. Gerdi Quist teaches Dutch language and lectures on multiculturalism and intercultural communication. Recent publications included a book chapter and journal articles on language pedagogy and intercultural communication.