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1) the ways they currently implement Twitter in their teaching and learning, 2) ideas for future development of Twitter-based assignments and pedagogical practices, and 3) issues concerning the integration of Twitter and other digital media into both traditional and non-traditional pedagogies. Collaborators should feel free to add material to these pages, to comment on existing material, and to share links to relevant external readings and resources. It may be helpful to tag your contributions with your Twitter handle. Collaborators are asked to please respect this space as a forum for open and respectful dialogue and networking. Let's fill up the pages below with great ideas!  Share the ways you currently implement Twitter in your teaching and learning: Students in my course New Information Technologies do an "Internet Censorship" project, focused on a specific country. I ask them to follow a journalist who tweets on that country as part of their research to understand the state of Internet freedom in the country they select. -- Lora Since shortly after Twitter was launched, I've experimented with various iterations of "The Twitter Essay," an assignment that has students considering the nature of the "essay" as a medium and how they might do that work within the space of 140 characters. -- Jesse (@Jessifer) In my fully online classes, I've started using Twitter to replace the discussion forum as the central location for student interaction. -- Jesse (@Jessifer) Show Tweets that have gotten people arrested and prompt discussion on whether it is fair that anyone be arrested for any Tweet in the US, who is likely to be arrested for their Tweets, what kinds of Tweets are likely to prompt arrest, etc. Students in my First Year Seminar course "The Irish Imagination: Yeats to Bono" developed a platform for digital annotation of Irish literature. Embedded in their platform was a twitter feed of relevant individuals/groups, makin

"Open with a question or two. Another favorite education writer of mine, the cognitive psychologist Daniel Willingham, argues that teachers should focus more on the use of questions. "The material I want students to learn," he writes in his book Why Don't Students Like School?, "is actually the answer to a question. On its own, the answer is almost never interesting. But if you know the question, the answer may be quite interesting." My colleague Greg Weiner, an associate professor of political science, puts those ideas into practice. At the beginning of class, he shows four or five questions on a slide for students to consider. Class then proceeds in the usual fashion. At the end, he returns to the questions so that students can both see some potential answers and understand that they have learned something that day. What did we learn last time? A favorite activity of many instructors is to spend a few minutes at the opening of class reviewing what happened in the previous session. That makes perfect sense, and is supported by the idea that we don't learn from single exposure to material - we need to return frequently to whatever we are attempting to master.But instead of offering a capsule review to students, why not ask them to offer one back to you?Reactivate what they learned in previous courses. Plenty of excellent evidence suggests that whatever knowledge students bring into a course has a major influence on what they take away from it. So a sure-fire technique to improve student learning is to begin class by revisiting, not just what they learned in the previous session, but what they already knew about the subject matter.Write it down. All three of the previous activities would benefit from having students spend a few minutes writing down their responses. That way, every student has the opportunity to answer the question, practice memory retrieval from the previous session, or surface their prior knowledge - and not just the students most likely to

"Estas son tres representaciones diferentes de la tabla periódica que muestran el consumo irracional de muchos materiales utilizados en aparatos electrónicos: la primera muestra el riesgo de escasez de cada elemento químico, la segunda el impacto en la minería y la tercera cuánto se reciclan. Este 2019 fue designado por Naciones Unidas como el Año Internacional de la Tabla Periódica de los Elementos Químicos, pues se cumplen 150 años de su creación por parte del científico ruso Dmitri Mendeleev. La tabla periódica de la escasez La tabla periódica del impacto en minería La tabla periódica del reciclaje"

"El país ocupa este puesto detrás de China e Indonesia según una investigación hecha por la Universidad Externado de Colombia. El 80 % de los ríos estarían contaminados con este elemento. La causa principal es que el 60 % de la minería es ilegal en Colombia, advierte el estudio publicado por RCN Radio. Entre los departamentos que más presentan este tipo de prácticas se encuentran Antioquia, Nariño, Cauca, Bolívar y Chocó, informó este medio. Milton Montoya, director de investigaciones de la Universidad, dijo a la emisora: La problemática de la utilización del mercurio en esos procesos mineros no es solamente el vertimiento en las fuentes hídricas, sino también la contaminación de los mineros que manipulan este elemento, básicamente por la evaporación e inhalación de estos vapores". La preocupación se intensifica en el Chocó donde las actividades mineras involucran maquinaria pesada y químicos tóxicos en zonas selváticas."

"Columna de Pablo Sigismondi en Nada del Otro Mundo... "

"Los vehículos eléctricos son una buena noticia en la lucha contra el cambio climático, pero la extracción de minerales para fabricar las baterías que los alimentan genera problemas ambientales en países del Sur en desarrollo, señaló este jueves 23 un informe de la Unctad. Pamela Coke-Hamilton, directora de comercio internacional de la Unctad (Conferencia de las Naciones Unidas sobre Comercio y Desarrollo), dijo que "la mayoría de los consumidores solo ven los aspectos 'limpios' de los automóviles eléctricos. Los aspectos 'sucios' del proceso de producción permanecen ocultos"."