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Visual learning analytics based on graph theory: Part I

All educational research and assessment are based on inference from evidence. Evidence is constructed from learner data. The quality of this construction is, therefore, fundamentally important. Many educational measurements have relied on eliciting, analyzing, and interpreting students’ constructed responses to assessment questions. New types of data may engender new opportunities for improving the validity and […]

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Safari Javascript bug

Recently we found that our Lab framework caused the JavascriptCore of Safari 5.1 to crash. Safari 5.1 is the latest version available for OS X 10.6. If you have OS X 10.7 or 10.8, then you have Safari 6 which doesn’t have this problem. Too long; didn’t read solution: do not name your getters the […]

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Scoring explanation-certainty items in High-Adventure Science

One of the questions unique to the High-Adventure Science project is what we call the explanation-certainty item set. These item sets consist of four separate questions: Claim Explanation Rating of certainty Certainty rationale In the first High-Adventure Science project, we developed these items as a reliable way to assess student argumentation and developed rubrics to […]

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More things, more people, more easily

“The most exciting thing about the Next-Generation Molecular Workbench is that it lets us to do more things for more people, more easily.” -Chad Dorsey, CEO & President of the Concord Consortium Have you seen the latest Next-Generation MW interactives? We’ve taken the physics-based interactive simulations and made them better. The Next-Generation Molecular Workbench is […]

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Share and embed—easily!

One of the key features of our Next-Generation Molecular Workbench is the ability to easily share and embed interactives in blog posts, learning management systems, emails and more—wherever you can paste a weblink or HTML code. Just two simple steps will have you sharing your favorite interactives with all your friends and colleagues in no […]

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Modeling Physical Behavior with an Atomic Engine

Our Next-Generation Molecular Workbench (MW) software usually models molecular dynamics—from states of matter and phase changes to diffusion and gas laws. Recently, we adapted the Molecular Dynamics 2D engine to model macroscale physics mechanics as well, including pendulums and springs. In order to scale up the models from microscopic to macroscopic, we employ specific unit-scaling […]

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