Roughly ten percent of elementary schools in California have a system whereby 4^th to 6^th graders share a common classroom and a single teacher (multi-age, multi-grade classroom). Suggest an experimental design that would allow you to assess the effect of learning in this environment. Mention some of the threats to internal and external validity and how you would attempt to circumvent these.

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The Answer of Roughly ten percent of elementary schools in California have a system whereby 4^th to 6^th graders share a common classroom and a single teacher (multi-age, multi-grade classroom). Suggest an experimental design that would allow you to assess the effect of learning in this environment. Mention some of the threats to internal and external validity and how you would attempt to circumvent these.

Roughly Ten Percent of Elementary Schools in California Have a System