Originally Posted by sanne
How exactly, logistically, are they going to teach one student high school level material?
It is my firm belief that if teachers were evaluated and schools were rated/ranked based on maximizing the achievement of each student (rather than based on closing achievement gaps and excellence gaps), then teachers, schools, and districts would find it very convenient to match the program to the child and provide instruction at the zone of proximal development (ZPD). Flexible cluster grouping by ability and readiness, without regard to chronological age or "grade level" would become commonplace. Classrooms would mirror real life in which people live, work, and play with others of varying ages.

The current construct, ushered in by common core, in which US government schools strive to create equal outcomes, is not natural. Which is to say that it is an outcome which does not occur in nature. In nature, there is variation.

Several points in this TED Talk by Sir Ken Robinson, April 2013, speak to individual variation, and may be of interest: How to escape education's death valley.

Originally Posted by sanne
I can't imagine how her needs could be met in lock-step education!
Agreed. This is true for many children.