There are many problems with this program.
This is not geared to a 3rd grader.
They explain too many things at once. They should have split the categories up. For example, the Nouns section explains over 5 different grammer rules in 1min 15secs. It should have been split into (Common Noun & Proper Noun), (singular, plural & irregular), Collective nouns, possesive nouns. It seems that it was easier for them to make the song by putting all these things in it. They should have spent more effort on this program.
The free version does a better job because it only explains one part of the noun. But that one also has problems. The songs are too fast in the free and paid versions.
Also, there are not enough questions. The free version only gives you 3 to 5 question to review. I would expect a lot more for the paid version.
Not worth $2.99.
LeonThePC about Grammar Jammers Elementary Edition