From MasteryConnect comes an amazing tool for Texas teachers. They have an app with all of the TEKS, our Texas state standards. There are also apps for other states. Every grade level standards for math, science, social studies, and language arts and now at the teacher's fingertips.
Make sure to check out this easy to use tool.
iOS - https://itunes.apple.com/us/app/texas-state-core-standards/id892241715
Android - https://play.google.com/store/apps/details?id=com.masteryconnect.tx