Pearson Education, Inc. has developed a kid-friendly app for learning grammar usage and mechanics. The primary edition of this app promises “catchy animated songs and rhymes [to] 
make English language arts exciting!” Grammar Jammers Primary Edition includes unique animations and quiz questions on the following topics: adjectives, contractions, nouns, pronouns, punctuation, sentences, and verbs. The app is free and is compatible with iPhone, iPod touch, and iPad. Requires iOS 3.1.2 or later.
Check out this YouTube video for a nice sampling of what’s available on the app. I absolutely love the music and imagine that both kids and adults (parents & teachers) could enjoy listening to it (unlike some cartoon/kids music!).
Grammar Jammers is also available in Elementary and Middle Editions. However, these editions of the app typically cost around $2.99.
What if I only have an iMac computer? Can it be downloaded and used on this?
Thank you for your inquiry.
It states online that the Grammer Jammers App requires an iOS of 3.1.2 or later and is intended for use on an iPhone, iPod touch, or iPad. However, you can always try to download the app and should be notified rather quickly if it worked.