Labs, Pandemics and the Future

puddle of a reaction on a laminated reaction sheet

"What are we doing to help kids achieve?"

More people are getting vaccinated. The data from my region shows that schools are not superspreaders. Kids are wearing their masks. Teachers are sanitizing between classes. Some teachers can plan an entire week with hope of no major surprises. Things are inching their way back to normal. It has just been announced here that some districts are going face to face next year. Yes, there will be restrictions, masks and social distancing. The question is....is it possible to pull off labs and if so how do we do this?

I cautiously started this semester trying to figure that out. I know that not everyone reading this may be facing the same circumstances I am. I am hoping this story can be a starting point for ideas and conversations....brainstorming and problems solving. Here is one possible attempt. The context...my students were studying "Types of Reactions". The topic begged for a lab instead of me being a demonstrator or talking head. This is what I did.

Microscale, Microscale, Microscale.

We were doing a lab in which students examine a variety of reactions. They were to make observations, balance reactions and classify the types of reactions. The "wet lab" portion was primarily collecting data. Microscale made this a dream for a teacher. The set up was easy. One set up would work for several sections and could easily be sanitized between classes. (The Student Document for this lab can be found in the Supporting Information below.)

Students needed a place to do the reactions. Laminated sheets worked amazingly well. Students were able to do multiple reactions. They could easily wipe the sheet down and start over if they made a mistake and they did not have to waste the entire bell. The sheets also lended themselves well to "puddle" chemistry as I have mentioned before.*

laminated sheet for puddle chem & two specific reaction puddles

Puddle Chemistry

 

Some students noticed what they thought was heat evolving from some of the reactions. The lab did not call for it but I was able to quickly grab a and get a few pictures. It made for a great discussion.

We were not able to get to all of the reactions. I was able to demonstrate the last few and was able to film them with a modest set up that many classrooms possess now. This activity is one that would be easy to capture on film with little time and effort once it is set up. Overall, the students were thrilled to finally do a hands on activity. Large lab benches allowed for social distancing. The microscale portion helped with time management. 

My goal for the summer is to create a spreadsheet with standards ( "I can" statements). I then plan to align all of my labs and demonstrations with the standards. I hope to have a reasonable microscale option and to safely provide some hands on experiences even if we are under restrictions. As things get better, I will be able to ease into some larger scale labs to provide students with experiences with different types of lab equipment. Interested in this plan? Stay tuned...and feel free to provide ideas or feedback.

*If you are interested in learning more about Puddle Chemistry, check out my previous blog posts.

 

Supporting Information: 

Safety

General Safety

For Laboratory Work: Please refer to the ACS .  

For Demonstrations: Please refer to the ACS Division of Chemical Education .

Other Safety resources

: Recognize hazards; Assess the risks of hazards; Minimize the risks of hazards; Prepare for emergencies

 

NGSS

Students who demonstrate understanding can construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

*More information about all DCI for HS-PS1 can be found at  and further resources at .

Summary:

Students who demonstrate understanding can construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

Assessment Boundary:

Assessment is limited to chemical reactions involving main group elements and combustion reactions.

Clarification:

Examples of chemical reactions could include the reaction of sodium and chlorine, of carbon and oxygen, or of carbon and hydrogen.

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Comments 2

Bob Worley's picture
Bob Worley | Fri, 04/23/2021 - 01:29

Chad

Great to see you doing the microscale. You do not need to use these amounts to get good results you know. Of course, you can always add more solid if you want but it is difficult to remove it from solutions.

What is interesting is the attitude of the students. Americans are known for the BIG experiments. We have noticed that working small begins to focus the students into the work and be less concerned about what is happening around them. I don’t know whether you have other chemists, suspicious of these methods at your establishment but if the see it they often leave behind their preconceived ideas of being too small and students not able to manipulate the equipment.

I hope you notice that all these Covid test kits are microscale!

If you or any other readers any like to see more, there are a couple of videos you might like to watch.

This one is by me which is about 20 minutes.

The second is by Adrian Allan ( teacher from Scotland)) and myself which we did for Science on Stage . Here is the film for the Science on Stage webinar​.

Chad Husting's picture
Chad Husting | Sun, 04/25/2021 - 13:32

Bob, Thanks for the comment.  Just so you know, I do have some people who insist that students must be introduced to certain equipment to move on or to "get ready for college".  However, when I ask college professors about their programs and how to best prepare incoming students, I get a different answer from each person.  My goal is to provide as much rigor and passion as possible.  My reasoning is that if a student is passionate about what they are doing, they will put in the time to figure out a new method or piece of equipment when the time comes.

I still have a goal of trying to match standards with experiments this summer.  If you have a repository or site for experiments, please pass them along.  I have found them to be very useful.  Thanks for all that you do.

Chad

By the way, loved the videos.