Not sure if you have heard of LearnZillion, but I ran across it yesterday and love it!
What is it? It is an online or APP tool that you can use as a teaching tool. There are over 2000 lessons that are specific to Common Core (Math & ELA). The lessons are PowerPoint presentations. You can assign specific students a lesson to view, so you can differentiate for the needs of all learners. I plan to experiment with it next year in 5th grade.
They have created the lessons, but they hope to make it to where you can create the lessons in the future.
Have you used LearnZillion? If so, let me know your thoughts about it.
You can also download the APP: LearnZillion APP