Keynote or Plenary

Improving education through research, at Vanguardia Technológica 2011, World Trade Center of Mexico City (Mexico City, Mexico), Wednesday, March 16, 2011:
Education is more than just transfer of information, yet that is what is mostly done in large introductory courses -- instructors present material (even though this material might be readily available in printed form) and for students the main purpose of lectures is to take down as many notes as they can. Few students have the ability, motivation, and discipline to synthesize all the information delivered to them. Yet synthesis is perhaps the most important -- and most elusive -- aspect of education. I will show how shifting the focus in lectures from delivering information to synthesizing... Read more about Improving education through research
Confessions of a converted lecturer, at Teaching and Learning Conference, Missouri S&T (Rolla, MO), Thursday, March 10, 2011:
I thought I was a good teacher until I discovered my students were just memorizing information rather than learning to understand the material. Who was to blame? The students? The material? I will explain how I came to the agonizing conclusion that the culprit was neither of these. It was my teaching that caused students to fail! I will show how I have adjusted my approach to teaching and how it has improved my students' performance significantly
Using technology to engage students, at EDUCAUSE Learning Initiative Conference (Washington DC), Monday, February 14, 2011:
It has been suggested the lack of interaction in large lecture courses is to blame for the many problems facing these courses: declining enrollments, low attendance, poor evaluations, and disappointing retention. We offer a way of redesigning the classroom so interaction is introduced in many aspects of the course. This approach has shown to be effective by many instructors in a broad variety of environments. I will demonstrate some of the tools we have developed to foster this interaction.
Confessions of a converted lecturer, at Center for Teaching Excellence Faculty Conference, Cornell University (Ithaca, NY), Wednesday, January 19, 2011:
I thought I was a good teacher until I discovered my students were just memorizing information rather than learning to understand the material. Who was to blame? The students? The material? I will explain how I came to the agonizing conclusion that the culprit was neither of these. It was my teaching that caused students to fail! I will show how I have adjusted my approach to teaching and how it has improved my students' performance significantly
Confessions of a converted lecturer, at 10th Workshop on Active Learning in Engineering Education (Santiago, Chile), Tuesday, January 11, 2011:
I thought I was a good teacher until I discovered my students were just memorizing information rather than learning to understand the material. Who was to blame? The students? The material? I will explain how I came to the agonizing conclusion that the culprit was neither of these. It was my teaching that caused students to fail! I will show how I have adjusted my approach to teaching and how it has improved my students' performance significantly
Black silicon: Engineering an intermediate band in silicon for sensing and energy harvesting, at First Annual Scialog Conference, Biosphere 2 (Oracle, AZ), Wednesday, October 13, 2010:
Shining intense, ultrashort laser pulses on the surface of a crystalline silicon wafer drastically changes the optical, material and electronic properties of the wafer. The resulting textured surface is highly absorbing and looks black to the eye. The properties of this 'black silicon' make it useful for a wide range of commercial devices. In particular, we have been able to fabricate highly-sensitive PIN photodetectors using this material. The sensitivity extends to wavelengths of 1600 nm making them particularly useful for applications in communications and remote sensing.
Thinking out of the box, at First Annual Scialog Conference, Biosphere 2 (Oracle, AZ), Wednesday, October 13, 2010:
What leads to innovation and how can we stimulate it?
Turning lectures into learning, at Turning Technologies User Conference, Harvard University (Cambridge, MA), Sunday, October 10, 2010:
The basic goals of Peer Instruction are to encourage and make use of student interaction during lectures, while focusing students' attention on underlying concepts and techniques. The method has been assessed in many studies using standardized, diagnostic tests and shown to be considerably more effective than the conventional lecture approach to teaching. Peer Instruction is now used in a wide range of science and math courses at the college and secondary level. In this workshop, participants will learn about Peer Instruction, serve as the �class� in which Peer Instruction is demonstrated... Read more about Turning lectures into learning
Confesiones de un profesor convertido, at Conferencia Inaugural de la Cátedra UNESCO, Universidad de Costa Rica (San Jose, Costa Rica), Tuesday, August 3, 2010:
Pensaba que era un buen profesor hasta que descubrí que mis estudiantes solo estaban memorizando información más que aprender a comprender el material. A quién debía culpar? A los estudiantes? Al material? Explicaré cómo llegué a la agonizante conclusión de que el culpable no era ninguno de estos. Era mi enseñanza la que causaba que los estudiantes fallaran! Mostraré como he ajustado mi método de enseñanza y cómo eso ha mejorado el desempeño de los estudiantes de manera significativa.
Comprensión o Memorización: ¿Estamos haciendo lo correcto?, at Foro Nacional de la Calidad Educativa 2010 (Bogotá, Colombia), Tuesday, July 27, 2010:
Educación es mucho más que transferencia de información, sin embargo es lo que comúnmente se hace en cursos introductorios de gran tamaño -– los profesores presentan material (a pesar de que ese material puede estar disponible en su versión impresa) y para los estudiantes el principal propósito de las clases magistrales es tomar la mayor cantidad de notas que puedan. Pocos estudiantes tienen la habilidad, motivación y disciplina para sintetizar toda la información que se les entrega. Sin embargo la síntesis es quizás el más importante -- y el más eludido -– aspecto de la... Read more about Comprensión o Memorización: ¿Estamos haciendo lo correcto?

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