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JCE ChemEd Xchange provides a place for sharing information and opinions. Currently, articles, blogs and reading lists from ChemEd X contributors are listed below. We plan to include other items that the community wishes to share through their contributions to ChemEd X.

Puddles, Dissolving and a Cool Conductivity Tester...

Conductivity Tester

One of my biggest struggles with students is to try to explain what happens when items, specific inorganic salts, dissolve in water. It might sound simple to me and you. Research shows that students have many real misconceptions when it comes to explaining inorganic salts dissolving in water. My own experience along with other teachers I know is that we are amazed and sometimes frustrated with trying to help students understand the simple process of dissolving, especially with ions. A key piece of equipment is a good conductivity tester. Just got done making a stack of them and can't wait to have students try them. But back to "dissolving"....

JCE 93.07 July 2016 Issue Highlights

Journal of Chemical Education July 2016

Exploration of Instrument Design and Performance

The July 2016 issue of the Journal of Chemical Education is now available online to subscribers. Topics featured in this issue include: cost-effective instrumentation, including 3D printed instruments and low-cost spectroscopy; laboratory instrumentation and equipment; effective teaching assistants in chemistry; laboratory experiments; resources for teaching; puzzles and games to introduce the periodic table.

NO MORE UNIT TESTS...What do you think?

My students are bright and motivated. Most work hard and prepare for class and tests. They perform extremely well on district-wide tests and my own classroom tests. However, I see real weaknesses on cumulative assessments requiring high levels of application. My students simply do not retain the content knowledge. I want to restructure my course to exclude "unit tests" and include only cumulative assessments. I'll share my early ideas here, and I would love to hear your experiences.

Especially JCE: July 2016

Back to school time means back to lab time too. Students new to chemistry have a lot on their plates the first few labs—learning unfamiliar safety procedures, becoming accustomed to writing lab reports, even figuring out which glassware they’re looking for in their lab space. How can teachers help them to navigate this newness? Two articles in the July 2016 issue of the Journal of Chemical Education are useful resources for “back to lab” time.

Punk Rock, Longboards and Mad Science

Longboard and Gas Laws

It all started with a class my son and I took together at Marc Adams School of Woodworking (link is external). To make a long story short, we started on a Saturday morning with nothing and left Sunday afternoon with a custom built longboard. (Think skateboard but...well...longer).

Chemical Mystery #7: Curious Cans

floating cans

​Q: Does an unopened can of soda pop float or sink in water?

A: It depends!

See if you can figure out what is happening in this twist on the classic floating-and-sinking soda can experiment.

The Big Picture - My AP Chemistry Scope and Sequence

AP PLANNING

In my last post, I discussed my first year chemistry scope and sequence. Here, I continue with AP chemistry scope and sequence, and a little bit with how I developed it the year before, the summer before, and during the year. Keep in mind, I consider the work I do with students to always be a project in progress. I learn so much from working with them as they engage with the content through a different perspective than I have.