Eureka Math is a free curriculum that can be found at GreatMinds.org. I did not write this curriculum. I am selling my time and creativity in creating a PPT supplement to help teachers teach the curriculum and manage their class time.
This is a PPT resource that will help you teach the fourth module (all 30 lessons plus the optional lesson on the Pythagorean theorem) of Eureka Math's "A Story of Ratios" for eighth grade. Lessons include I Can Statements, Concept Development, Examples, Exercises, Exploratory Challenges, Discussions, Closings, and Problem Sets.
I began creating these PPTs to help with time management. When I first started teaching Eureka Math, I had a very difficult time getting it all in. I now mangage my class time and enjoy teaching again. Best of all, my kids are engaged!