I did a bit of reading on the web and tried it out a bit more and discovered a couple things about it.
1. You can write an equation like 2x ? + 1 =9 and it will write 2 x 4 + 1 = 8. It will actually solve the problem.
2. If you do 2 x 3 = 5, it will give you the answer 2 x 3 = 5 + 1 so it takes your answer and tells you how far off it is.
3. Since it only does nth roots by using the fractional form of the radical signs, this means that students get more practice on converting radicals into fractional exponents. I like this because too many of my students have trouble with the connection.
Finally, the student I let try it out for some work, loved it.
I am going to continue exploring it this summer but I think I will put it n the iPads in the fall.
I showed the subtext app to the principal who used to be the science teacher. His first comment out was that you could set up a whole week doing this type of app. He was impressed.
So I have 3 to 5 apps that I will be working on over the summer to prepare for the fall. I will be sharing things as I set them up.
One last thing. My 9th graders love using the Venn diagrams to find LCM and GCF because it allows them to see the relationship between the two. I am going to see about creating a document that I can use with subtext or with the students that they can fill out for themselves.