In the long run this is going to be primarily online textbook, but for right now a number of the students are using print copies because not all the classrooms have enough computers. They've been using the new textbook since the beginning of the school year, and by most reports the experiment is going well. The students are learning, grades look good, and the teachers are working the bugs out of the curriculum.
The teachers have a long term plan to maintain and update the online textbook, with revisions already planned for several chapters. They also plan to share it with other MN high schools next year.
While writing a textbook looks like an impossible task, they didn't exactly have their work cut out for them. The teachers didn't have to write the stats textbook completely from scratch; instead they used an open source textbooks as a source.
There's a growing movement for open source textbooks here in the US, and there are a number of different non-profit organizations that collect and distribute them. The CK-12 Foundation (where this textbook came from, originally) offers CC licensed textbooks for a bunchaton of different classes in math, science, and other curricula. Because these textbooks are CC licensed teachers can use them without cost and they can create their own version - one that meets their needs and (most importantly) follows the educational guidelines for their state and school district.
In this case the teachers also added a fair amount of content. I'm told that the chapters on probability were for the most part rewritten by one of the teachers, and the chapters on statistics were drawn from the source CK12's basic stats and AP stats with some of the teams own work added to fill in the gaps and meet the guidelines.
I would bet that meeting the MN state standards was almost as important to the teachers as saving the money. You see, a lot K-12 textbooks are written to fulfill the requirements of the more populous states - Texas and California, for example. The states with the big markets and the most contentious regulators get the most attention from textbook publishers, and everyone else pretty much has to use what is available.
At least, they did have to use those textbooks in the past; now they can make their own. And that makes me very happy.
I've never liked the fact that textbook publishing is an industry. Education is the bridge you cross to get to a better future, and textbook publishers are the toll collectors exacting a fee from all who pass. The simple fact that there is a toll restricts those who pass to only the more affluent students. It's difficult to succeed without an education, but it's easy to stay poor. That reinforcing loop of the poor staying poor is not good for society overall.
While I respect a publisher's desire to make a living, I feel education is too important for it to be subordinated to someone's profit margin. And that is why I like it when I find someone bypassing the textbook publishers.