Pennies made after 1982 are ~ 95% zinc with a plated copper exterior. Thus, a penny contains two metals and can, if manipulated properly, be converted into a battery. See video below:
This video is LEGIT, and upon seeing it, my gut was to provide students with this video, the materials, and let them go at it as an introduction to our unit on energy in Biology class. (Mitochondria metaphor, etc.).
Then I remembered the research on curiosity! The goal is to intentionally withhold the IDEAL amount of information.
Peak interest, but create suspense. Provide enough information as to not demotivate, but leave enough out as to keep the learner guessing.
The below "inverted U" graph of Curiosity vs. Knowledge (knowledge confidence), provides a great visual.
Inspect it carefully.
Have all the info. Not curious. Have no info. Not curious. Withhold the ideal amount. Curious.
So, back to the initial activity. I fear that if I give students the above video, as awesome as it is, the activity will transition from science to "arts and crafts".
I fear that by providing the video, I will provide too much information, push students to the far right of the "inverted U" and minimize curiosity.
DESPITE how engaging the activity is!
The engagement lies not in the video quality, or the task, but the anticipation of what will happen.
The frustration in not knowing exactly what will happen, or how to do it.
The tension that is built when the instructor perfectly provides and withholds.
The cognitive reward the learner receives when that tension is revealed.
We all love solving riddles.
This is the true "Call to Adventure".
So here is what I'm going to do instead.
Step 1: Tell students that electrons can flow spontaneously through a material when two different metals are connected through a conductive solution.
Step 2: Tell students that pennies after 1982 are platted with copper.
Step 3: Provide students with the exact materials shown in the screenshot from the video above. Include the video title "How to Make a Penny Battery from Start to Finish" in the below image as a strategy for pushing students directly under the "inverted U" shown above.
Step 4: Challenge students to light the LED using only the materials provided in the above image. Remove internet privileges to ensure that information is strategically withheld and students do not look up the above video.
Step 5: Play the above video.
Step 6: Treat this as the first two"Es" (Engage and Explore) in the 5E Learning cycle. Continue on with lesson. Etc., etc.
As I continue to 5E Lesson Cycle examples, I thought I would share a short example of a game I play to make the often boring "Explain" phase of the cycle, not so boring.
The "Explain" phase is characterized by the delivering of lower Blooms Taxonomy type information to help students fill in knowledge gaps intentionally surfaced during the "Engage" and "Explore" phases. Spackle, not paint.
Think of Daniel Larusso in the Karate Kid painting his mentor's fence, or waxing his car. Lower Blooms information that the learner returns to, despite its monotony, because the student has been Called to Adventure. The menial tasks have a meaning. They have context. The mentor is delayed.
After a laboratory on Flame Test colors with my Honors Chemistry students, where they were challenged to predict the relationships between electrons, energy, and light, I was challenged with boring task of teaching them how to write proper Electron Configurations. The "wax on, wax off" of chemistry.
The skill is quick, but requires a lot of repetition to master, before we can move onto the "Extend" phase of applying their knowledge to more complex, and applicable content domains such as Photoelectron Spectroscopy. It is a perfect candidate for my favorite game: Lower Blooms Hoops!
Here is how I do it:
My kiddos literally solved 100 electron configurations today. Not sure what I'll give them, but that's not the point. Shh....
Check out a quick video of the process I took today. Apologies for the quality and informal style of the videographer :)
I have written in the past (click here and here) about my transition from formal lab reporting to the use of Google Slides as a student form of reporting lab work.
Today I sat down to begin the arduous process of finalizing all fall semester grades for my sophomore chemistry class and the benefit of using Google Slides their lab reporting format was clearly evident!
My final "stack of papers" to grade was a shared folder full with our final lab practical reports: a group experiment where students determined the optimal H2-O2 ratio to fill a 2L bottle fo for maximum product upon ignition.
Not only was I able to grade each project directly from my phone, but embedded video of procedures, screenshots of calculations, and clear images of laboratory procedures made for a meaningful assessment process.
MORE IMPORTANTLY, the process of student creation and curation of their work using a Google Slide template (click here for the one used in this activity), was fluid, easy, and put the learning, rather than the reporting, at the forefront.
Below is an embed of one group's "report".
I love teaching with manipulatives.
Whether it be scotch tape, thumbtacks, bubbles, hula hoops, balloons, cardboard, or magnets, physical objects can assist greatly in making that which cannot see, tangible.
In chemistry class specifically, one of the most difficult concepts for students to grasp is the concept of Ionization Energy.
Understood as the minimum amount of energy required to remove an electron, conceptually understanding the pull that an atom's positively charged nucleus has on the surrounding electrons is an important foundation for understanding a myriad of other concepts in chemistry.
Given that a solid understanding of Ionization Energy requires an ability to visually abstract what is happening at the atomic level, it is of no surprise that students struggle with this concept.
Below is a video of great manipulative I have been using to help students better understand Ionization Energy.
By using one magnet as the positively charged "nucleus", another magnet, wrapped in tape and attached to a rubber band as an electron, and cardboard as various energy levels "shielding" the outer electrons from the nucleus, students can easily model the strength of nuclear pull qualitatively (how "hard" it is to remove) and quantitatively (how "far" you can pull the rubber band).
Additionally, by adding cardboard layers (energy levels), the relationship between the distance an electron is from the nucleus and the associated Ionization Energy is easily modeled. Click here (scroll to #14) for an example of how I structured this manipulative in the form of a lesson in my chemistry class this year.
Recently I stumbled upon a series of videos called "5 Levels of Difficulty". In each video an expert explains a difficult concept in 5 levels of increasing complexity:
I was inspired by this video series for a few reasons. First, it reminded me how explaining a difficult concept to a novice and expert audience simultaneously requires deep conceptual knowledge and how listening to such an explanation helps to build simultaneous conceptual and mechanical knowledge of a concept. Second, it motivated me to reimagine how I assess my students.
Keeping the above in mind, for our unit on Cellular Respiration in my freshman Biology course, rather than assign a traditional topic exam, I decide to create a variation of the 5 Levels of of Difficulty videos shown above that will serve as the assessment for this topic. In short, students will create similar videos explaining Cellular Respiration at 3 rather than 5 levels of difficulty.
I have embedded a document below that explains the intricacies of the assignment. Click here to view the spreadsheet where student "3 Levels of Difficulty" scripts and videos will be collected.