Results of Using DKYNTK with Students


What effects have the text had on students using it?

Students (regular HS general chemistry) were given pre/post surveys with 15 questions.  The effect of using Chemistry You Need to Know compared to traditional chemistry texts was analyzed.  Effect size is the difference of the averages divided by the average of the standard deviation.  It’s a way that behavioral scientists judge what a “practical” or important effect is.

An effect size smaller than 0.2 is considered minimal

0.5 is considered moderate

0.8 is considered a large effect.

As you can see 9 out of the 15 questions showed a large positive effect of the use of Chemistry You Need to Know and another 4 questions showed a moderate effect.  There were NO questions for which the traditional effect had any positive effect at all!

Effect size–the larger the number, the greater the positive benefit of using Chemistry You Need to Know.
1.26
I’m interested in chemistry
1.24
I was able to read and understand this book
1.22
I like science classes
1.175
This chemistry book applied chemistry to my life
1.16
I can see how different science concepts relate to each other (it’s not just random facts/information)
1.11
I feel comfortable “doing science”
1.04
I feel chemistry is relevant to my life
0.96
I’m comfortable learning/talking about chemistry
0.88
I enjoy labs
0.78
I feel science is relevant to my life
0.74
In this classes, I feel like I have “done science”
0.69
I understand what “chemistry” is about
0.597
I feel comfortable using math in science class
0.23
I enjoy writing my own procedures for labs (designing them myself)
0.17
I learn better if concepts are applied to my life