I found the parent’s response in this article very interesting as well as the follow up by John (the author of the blog).
We’ve engaged in hands-on math at McAuliffe since we began 40 years ago. The power of this approach is the depth of understanding our students develop and their ability to communicate this information to their peers and adults with equal finesse. Our students also understand that there are multiple approaches and, as a result, are free to hear their peers as they share alternative ways to address the problem. This becomes even more apparent as the math problems become more complex.
The transition for schools that haven’t used this approach previously must be challenging and exciting!