Forum: Demonstrating Exponential Growth In Pre-School
gravatar for Asaf
5.7 years ago by
Asaf6.3k wrote:

Hi all,
My kid is in pre-school and on each week one of the kids presents a profession, mine chose to present microbiologist (I tried to talk him out of it). Besides demonstrating what microbiologists do, they (we) need to come up with some activity so I will give him some plates to grow bacteria on but I thought I'll come up with another more "active" activity, maybe demonstrating how fast bacteria grow. Any suggestion for how to do that? Any suggestion for other bacteria-related activity? The kids are 5-6 years old.

forum education • 1.7k views
ADD COMMENTlink modified 5.7 years ago by SES8.2k • written 5.7 years ago by Asaf6.3k

you should ask

ADD REPLYlink written 5.7 years ago by Pierre Lindenbaum123k

Memorable related activities from when I was a kid - streaking out plates with q-tips from different parts of the classroom, girls and boys bathrooms, etc...

Pond scum under a microscope, though maybe too young for that?

Maybe you could have all the kids on one side and sort of send over more kids to one side or within a tape circle, doubling the number every time? It would get crowded pretty fast.

ADD REPLYlink written 5.6 years ago by Madelaine Gogol5.1k

Nice ideas, thanks. I have a microscope but it's pretty hard to find a pond in Israel these days...

ADD REPLYlink written 5.6 years ago by Asaf6.3k
gravatar for Mary
5.7 years ago by
Boston MA area
Mary11k wrote:

Have you seen the demos of a laser pointer and a drop of pond water? I bet that would interest kids. Of course--safety first--no laser pointers to eyeballs.

Here's one sample: and another setup with less overhead:


I think just getting across the idea of teeny things you can't normally see live in water might be sufficient at that level.

ADD COMMENTlink written 5.7 years ago by Mary11k

Wow! I hope this will work, looks too good to be true

ADD REPLYlink written 5.7 years ago by Asaf6.3k
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