While it is important to practice and master the skills found in the Common Core State Standards Initiative, it is also important to use iOS Apps in which students can create a product to SHOW WHAT THEY KNOW.
Try some of these:
Book Creator
$4.99 in the Apple iTunes Store.
EduCreations Interactive Whiteboard
Free in the Apple iTunes Store.
Puppet Pals HD
Free in the Apple iTunes Store.
Toontastic
Free in the Apple iTunes Store.
Toontastic Jr. with Shrek
$3.99 in the Apple iTunes Store.
I Can Animate.
$2.99 in the Apple iTunes Store.
Popplet
$4.99 in the Apple iTunes Store.
StoryKit
Free in the Apple iTunes Store.
I Tell a Story
$.99 in the Apple iTunes Store.
My Story - Book Maker for Kids
$1.99 in the Apple iTunes Store.
Kid in Story Book Maker
$6.99 in the Apple iTunes Store.
Story Creator
Free in the Apple iTunes Store.
Little Story Maker
Free in the Apple iTunes Store.