Bits & Bytes 

The 5 lessons in the Bits & Bytes series focus on computational thinking. They introduce CS concepts in the framework of everyday life experiences. Text and audio files guide the beginning programmer comfortably from problem solving strategies, object oriented design, storing and processing data, to AI and GUI development. Check out the complete list for beginner learning.

Check out the rest of the Microsoft Beginner Developers Learning Center. It's full of resources for your own learning and to use with students.