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Lab course that starts with students' own ideas wins Science magazine prize
Date:8/30/2012

dule chosen to win the IBI prize, students receive a chemical equation for the synthesis of gold nanoparticles. They are asked to describe their understanding of what they think they will observe in the lab and what will happen at the molecular level. They are encouraged to think about what evidence they can collect in the lab to test their models. Students then conduct experiments, synthesizing different sizes of nanoparticles using varying amounts of sodium citrate, for instance, and using laser pointers to collect evidence related to the nature of the reactants and the products.

Using the MORE method, Rickey's research shows and promotes a deep understanding of the material being studied. Even on the students' examsbased on class lecture not lab, and often presenting examples that are slightly different than those explored during the lab part of the classthe MORE method improved students' understanding, transfer of learning from one topic to another, and scores. Students in a control group who were not using MORE did less well.

Rickey's research at Colorado State University, where she is an associate professor of chemistry, delves into why the MORE method improves students' understanding. So far she has found that constructing molecular-level models according to the experimental evidence, reflecting accurately and completely on how one's own ideas about the molecular-level processes changed over the course of the experiments, and identifying evidence to justify changes in those ideas all correlate to deepened understanding. Having the correct idea starting out bears no relationship to acquiring deep understanding.

Meanwhile, the use of gold nanoparticles allows students to understand nanoparticles, which are important to contemporary science and engineering, Rickey says. For example, nanoparticles are used in tumor detection, and the final part of the course module explores the use of gold nanoparticles as optical biosensors. Each labo
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Contact: Natasha Pinol
npinol@aaas.org
202-326-6440
American Association for the Advancement of Science
Source:Eurekalert

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