Montessori, or any kind do program with a high level of independent work has to be *extremely* structured on order to work well because it can disintegrate so fast otherwise. Unless you can actually see a classroom in action it is hardly possible to tell whether it works well for your kids specific EF challenges. If I understand that you currently have a good option for your kids to be challenged at their level, but are looking at this for the smaller class sizes? I'd be wary if rocking this particular boat...
