In reality, there is no one single answer to curriculum choice. Many homeschoolers for example have had great results from the Math U See program. Curriculum choice matters to many, many families and groups.
The primary challenge for all schools, private or charter, in providing parents curriculum choice is the accountability. How does a school track every type of curriculum? How do teachers review the work completed by students to ensure they are completing the curriculum as selected by the family? How do teachers help with unfamiliar programs?
Studia Nova is able to offer custom courses and curriculum choice to Co-Ops and Microschools. We are able to leverage the accountability functionality of our learning platform to facilitate almost any selected curriculum. We love evaluating new methods of learning and are excited to partner with our Co-Ops and Microschools to deliver on student learning and family choice.