Originally Posted by W'sMama
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How do they do the grouping across grades and keep it flexible?

My ds' school does this (across multiple grade levels) in some subjects by scheduling a subject at the same time every day across all grades. In grammar they differentiate by having the kids work independently at their pace in leveled series textbooks. In subjects that are tackled together as a grade-level class students are encouraged (actively) to dig deeper and explore based on their abilities.

polarbear