What's what in DNA Models. . .

Anyone who's been looking knows that there are a few (ha ha ha) choices for teachers looking for DNA models.  There are so many things to consider when choosing a good model, that it's often hard to decide what's important and what can go by the wayside. 

For my money, I prefer to use two different DNA models in conjunction with each other.  Both are resonably priced and using different models insures that students understand the material and not just the model!  I prefer Carolina Biological's DNA Modeling Kit and K'nex brand DNA Models. 

Carolina Biological's DNA Modeling Kit
Pros:  This is a great model for showing bonding between the neucleotides.  Students have to understand which are joined by double and which are joined by triple bonds.  The model itself is flexible and hardy and it comes with so many pieces that you can loose a few and not have to worry.  This kit also comes with a nice booklet with some activities that can be done using the model.

Cons:  Its not a flashy model and it comes in a ziploc plastic bag, so don't look for the students' interest to be peaked right away.  This model takes a little more instruction than others because students aren't necessarily willing to get in there and start building.  The pieces to this model are also very small, so it would not be appropriate for young children. 

K'nex DNA Modeling Kit

Pros:  Students are already familiar with the K'nex name in toys, so even older students are eager to get their hands on this one.  This model is great for modeling the double helix and students create a nice, showy example.  This kit also allows for transcription activities as well, since it includes pieces to represent mRNA.

Cons:  There aren't enough pieces in this kit that you can afford to loose any of them.  The actual composition of the sugar-phosphate backbone is a little unclear, if this is the only model you are using.  There's nothing to indicate the difference between double and triple bonds on this one either.


Got a favorite DNA model that you use in your classroom?  Comment here and tell us why you like it.  Think your DNA model is a joke?  Let us know that too!