Most of our lessons are connected to the Common Core Standards, and the standards relative to each lesson are indicated. This is helpful for those who need a lesson that is complementary to district expectations, and for parents engaged in homeschooling. Other lessons are informal in nature, but they still support authentic learning. Enjoyment is part of the process after all, for both you and students.
If you are not concerned with standards, then know that these lessons can stand alone as both effective and engaging in delivering content to students.