We all know how fundamental the mole concept is for stoichiometry. This year I brainstormed ways to really make it stick. I decided to do multiple mini-practicums, one for each learning target of the mole unit. I am sharing brief descriptions of the mini-practicums I did for each learning target.
I have had a variety of students with a broad range of academic abilities in my class at once. This hook doesn’t feel particularly deep until I stop and reflect for a moment on what that looks like.
A raspberry pi is the one of the world's cheapest computers. It is a $35 computer that runs off of an eight gig SD card. Anyone can program it with Python (a relatively simple coding lanquage) and it can do small things.
Flinn Scientific has a great elearning video series. Many of the videos have master teachers demonstrating some great labs and techniques that they do in the classroom. A general theme in many of the videos seems to be combining demonstrations, labs, calculations and lab practicals. The nice part about what occurs is that for whatever concept the students are doing, it is not enough to come up with an answer on paper. They have to use that answer for a prediction and then see if they are correct actually checking and manipulating material. This idea has added a new dimension to my classroom. Students who are tired of "pen and paper" work now get to get up and use their answers to mass something or find the volume of something and see if they are correct. I have tried to add more of these to my lessons.
What is your definition of the term “mole” in chemistry? Many articles have been written about the term and the confusion surrounding it. It was not considered an SI unit (with an IUPAC definition) until 1971. IUPAC is considering a change to the 1971 definition. There has been discussion about whether the SI definition of the mole as determined by IUPAC necessarily needs to be identical to the definition used by chemists and teachers. This article provides a short list of some recent JCE articles discussing the change and what it might mean for teachers while also considering some misconceptions related to the mole in chemistry class.
We teach it, some celebrate it, and we try to make it engaging for our students. What is it? The mole concept and Mole Day! So how do we make it engaging for our students? Let me introduce #molympics.
Moles, mole ratios and stoichiometry have been frustrating topics for many of my chemistry students. The MOLE and Avogadro’s number get tangled up in other Chemistry jargon and students have stared at me like I am speaking another language. I have been around long enough to know this is a problem that many of us have faced. I have tried many ideas that have helped and I want to share a few.