Depending on the number of families who sign up, the cost could be as low as $67 for this online, interactive learning tool.  I've previewed some of the "gizmos" and they are very interesting.  The target grade range is 3rd through college, so I'm not sure I can justify the yearly subscription just yet. I do hope the same deal is offered in a year or two.  (Then again, I have until March to make up my mind.)

Visit the co-op's website for details:

https://www.homeschoolbuyersco-op.org/