You will need:
- Iodized salt
- Vinegar (regular or apple cider)
- Old dull pennies (More than enough with one for each student)
I begin the lesson by gathering the class together on the carpet. I explain that I was looking to give them each a "lucky" penny as a small token for their first week of school.
This leads to the idea of trying the vinegar. So I give them a new bowl. We wipe of the penny and put it in the bowl with a little vinegar. You really do not need much. Just enough to cover the penny.
Have the students pour the salt from the first bowl on top of the penny in the bowl with the vinegar. As soon as the salt hits the penny in the bowl with the vinegar, the penny changes right before your very eyes. Seriously, all you need to do is lightly swish the liquid around. That penny will really shine.
Check this out! It works every time!
So here it the opportunity to explain that this experiment is like our classroom.
I as the teacher cannot do the work all by myself.
The students cannot do it all on their own.
But, together, the possibilities are endless.
I then have children play with the penny, tracing, rubbing... and finally we tape it on the paper for them to take home.
Hope you try it.
P.S. You can even offer some cider and vinegare potato chips as a snack!