Comparative genomics, the mapping
of the human genome, and the rapid explosion of information
about genes, DNA,
and how they affect our relationship to the world around
us, has made the teaching of these concepts increasingly
important. I’m Kathleen Cook. I’m an adult
with a college education, yet I found myself reading
the book "GENETICS FOR DUMMIES" by Dr. Tara
Rodden-Robinson just to gain a vocabulary and understanding
basic enough to ask questions of those developing lessons
in DNA for grade school children.
Every summer kids head off to camps of various sorts;
there’s
soccer camp and music camp, outdoor camps with swimming
and archery. Well, this summer, on a day hot enough to
need a fan on in the room, I visited some 8 to 12-year-olds
at the Discovery Center of the Southern Tier in Binghamton,
NY for Day 4 of their week-long Amazing Arachnids Day Camp
session where, as you may guess, they’ve been learning
about spiders.
"Thank you so much for inviting me to your camp today. Today
we’re going to talk about DNA."
Wait a minute. Did she just say DNA?
" DNA really is a more common concept than even
when I was younger and I was going to school. So I think
it is good
to start explaining this early."
Binghamton University graduate student Angela Lundgren
interned with the Discovery Center to research and create
lessons for their spider camp.
"The camp’s lessons included spiders so I was trying
to figure out how to blend DNA and information about spiders.
It kind of works good because, you know, you start out
talking about DNA and then you have a specific example
besides humans. OK, spiders have DNA and spiders are unique
because they spin webs. It’s their DNA that lets
them be able to spin webs because in their DNA it’s
passed on from every generation how to spit webs and how
to make their silk."
Then teacher Nikki Barnard used those ideas to work with
the kids.
"
The topic of DNA obviously applies directly to them so
when we can explain DNA using who they are and who their
parents are and who their family is, then I think it becomes
more personal and it’s something they can really
relate to."
"DNA is like a blueprint that your body reads to tell your
body what to look like. Every cell in our body is made
of DNA and DNA gives that cell a code called genes. Have
you heard of genes? Maybe you haven’t heard of DNA
so much, but you’ve probably heard of genes. Not
the kind of genes you wear. So, your genes are a code and..."
"I started explaining it, you know, like writing out and
that’s when you take a step back and you’re
like, OK, how can I explain this to children?”
Angela Lundgren.
"If you make it simplified they’re still getting the
main points, you know, younger children than maybe I thought
can be doing this. I included a lesson plan on genetic
cells and DNA. The DNA really explains how DNA is a code
that carries information because now-a-days kids understand
codes. With the internet you don’t see the things
carrying information, but yet it still does. So DNA is
something that everything has and each DNA strand has specific
information. When you talk about the specific information
that’s when you get into the genetics. I included
a lesson plan on cells because every living thing also
has cells and cells are where DNA is found."
"One kind of cell that is large that we can think about
and look at all the different parts. An egg is actually
one gigantic cell. So we’re going to take a look
at some eggs. We’re going to crack them open and
look at the different parts of the cell."
"It was a fun activity that our intern came up with" (Nikki
Barnard) "a monster family and the kids create a pretend
monster family and the mom looks like this and the dad
monster looks like this and then they have to make the
baby monsters. So, I think once they have an understanding
of the DNA and the first level affects the next level organisms
then they can have hands-on fun ways to apply their understanding
of it."
"DNA is shaped like a ladder almost and then on each one
of the rungs of the ladder as you imagine a ladder you
climb up, that’s where all of the genes are; all
of those codes to tell your cell what to do. So we’re
going to make a model of a DNA strand and we’re going
to put your information from your little tally chart on
the rungs of the ladder." (Angela Lundgren)
"You know when you send an email it goes someplace else,
or even when you watch television it’s coming from
somewhere else, but you can’t see it. The DNA holds
information like an email and then when you click and
open the email you can see the information. Well the
DNA is
carried and you can see the information that the DNA
carries through you, you know, through a spider and the
types of
webs they make, what it hunts, how it lives, what shape
it is. You can see the DNA physically being imprinted.
You may not see the actually strand of DNA, but you can
see the results of DNA."
One of the experiments used at the camp involved actually
extracting DNA from strawberries.
"One of the things that we’re going to use is a baggie
and it’s just like a Ziploc bag. Of course, we have
our strawberries, our organism that we’re going to
extract the DNA from. This test tube is filled with water
and salt, and this is the extraction solution. It’s
going to be able to break down the cell wall and extract
the DNA. It’s pulling the DNA out of those cells
once we get the cell wall broken..."
Each child was given strawberries they put into a zippered
plastic bag, squished into a pulp, and pressed through
cheesecloth extracting only the juices. Then a solution
was added to the juice to separate it further and make
the DNA material rise to the top. The kids were able to
take the gooey substance from the top, put it into Petrie
dishes, and look at it under a microscope.
"Yes, look, that’s DNA."
"You got a magnifying glass to check it out?"
"No, that’s not DNA, this is. I picked all the DNA
off of that."
"So what does it look like under there? Can you describe
it?"
"Kind of like a half-eaten jelly bean, like the inside of
a jelly bean."
"It’s pretty cool."
"So what do you think this has to do with spiders?"
“It’s the DNA that makes them know like when they
spin a web or something and how they get the web in their
spinnerettes and stuff like that, that they’re
going to have 8 legs and all that stuff."
"It sort of helps them think. It tells them what color hair
they have and what kind of spider they are and what web
they’re going to make."
"Now that is awesome!"
"When you give kids opportunities to get excited about new
science ideas you’re really planting a seed and even
if they don’t understand the full concept on all
of its levels that seed is planted and then maybe next
year when they’re in the next grade or when they
come in contact with that concept again they get it. That
light bulb goes off, and they say OH, yeah, yeah, I know
all about that, and they feel good about themselves. That’s
what it’s about I think."
This segment is the first of a 5-week series made possible
with support from the DNA Files, a project of Sound Visions
Productions. Visit our website at WSKG.org to see videos
of the kids learning about DNA at camp this summer and
to explore other resources about DNA and genetics.