If you are looking for real life applications, puzzles, interdisciplinary connections and creative interactions to be a part of your student’s math learning experience, you need to take some time to look at Mathigon.org. Mathigon is a site that provides your students an engaging opportunity to explore and discover math.
They provide a course library of lessons focusing on various grade bands: Grades 6-8, Grades 9-10, and Grades 11-12. These are lessons that will guide the students through the content. Some of it is still being constructed but there are some great ones to begin with.