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Fluorescence of sunflower dye
by Tom Kuntzleman
Tue, 03/28/2017 - 08:39

The chemistry of the Sunflower dye found in McCormick’s Color from Nature food dyes is explored in this post. This is the last in a three-part series in which several experiments and demonstrations that can be done with Color from Nature food dyes are described.

Recent activity: 13 hours 3 min ago
by Deanna Cullen
Wed, 03/22/2017 - 08:37

The American Chemical Society will celebrate Earth Day on April 22, 2017. This year's theme is Chemistry Feeds Our World. I have gathered some resources related to food and cooking from ChemEd X in honor of the theme. I have also included links to other resources. 

Recent activity: 6 days 9 hours ago
hydrate lab
by Chad Husting
Wed, 03/22/2017 - 07:42

My students and I tend to have good experiences with a hydrate inquiry lab that I have "tweaked" (see the previous blog). Essentially, my students have some practice with hydrates in the lab and then they are provided an unknown hydrate. They must separate off the water by heating and calculate the mass of the anhydrous salt and container before they come up and put it on the scale. As an added twist, they must also ask me a question about what information they need from me to calculate the mole to mole ratio of the salt to water.

Recent activity: 6 days 7 hours ago
by Ben Meacham
Mon, 03/20/2017 - 14:45

As our Gas Laws unit was coming to an end, it was time to create the test. As I thought of potential test questions that were both challenging and in alignment with the learning objectives we had previously identified for the unit, I was reminded of a multiple-choice question I had been shown in an old Modeling InstructionTM resource.

Comments: 15
Recent activity: 1 day 7 hours ago
ACS Regional Award for HS Teaching
by Patricia Mabrouk
Thu, 03/16/2017 - 13:08

In 2006, The Division of Chemical Education endowed an award program, the Regional Award for Excellence in High School Teaching, to recognize and inspire outstanding high school chemistry teachers. Each of the ten Regions of the American Chemical Society solicits nominations for this award. The winners receive $1000, an engraved plaque and travel expenses to the meeting where they are honored.

Recent activity: 1 day 4 hours ago
by Allison Tarvin
Sat, 03/11/2017 - 10:11

HCl and NaOH, a strong acid - strong base titration? Citric acid and NaOH, a weak, triprotic acid - strong base titration? Do your students standardize the NaOH solution as a first step?

Comments: 1
Recent activity: 2 weeks 13 hours ago
by Chad Husting
Sun, 03/05/2017 - 11:16

Formative assessment can be a double edged sword. It can be and often is extremely helpful. Some quick short three or four well worded questions at the beginning of a unit provides information about student abilities. A teacher can skip teaching information that kids already know or the teacher can discover concepts that he or she assumed students know but do not. Formative assessment about "Moles" can provide data that is hard to deal with. Can the students handle scientific notation? How well are students at basic math skills?

Recent activity: 3 weeks 2 days ago
by Tracy.Schloemer
Sun, 03/05/2017 - 11:00

How do you support growth in your students’ writing and communication over time? There are so many things: Claim, Evidence, Reasoning (CER) scaffolds, sentence starters, and more. How might all of these tools used in introductory courses come together in an upper-level course? In this post, I will focus upon my AP Chemistry lab notebook set-up.

Recent activity: 3 weeks 1 day ago
by Deanna Cullen
Fri, 03/03/2017 - 15:57

The American Chemical Society is offering a new service in hopes of making science more accessible to the public. Each week they issue a short collection of science articles, written in an interesting and engaging style, that you might use with your students to help them make connections between the curriculum and their own lives. The service is called Discoveries!, and it is free.

Recent activity: 3 weeks 1 day ago
connecting ionization energy to electron configurations
by Laura Wang
Tue, 02/28/2017 - 10:01

After spending the start of the year using a modified version of the Modeling Instruction curriculum (density and physical properties, followed by gas laws, followed by energy and phase changes), we don’t actually start talking about what’s inside atoms until December. I love that by this point students are already familiar with some of the habits of mind needed to reason abstractly about atoms -- thinking proportionally, explaining macroscopic observations at the particle level -- and we are ready to layer on both more abstraction and the symbolic level. By January, we are ready to explore electron configurations.

Recent activity: 4 weeks 3 hours ago