If tracking placing slow learners in slow classes, fast learners in fast affects test scores at all, the effect is too small to be pedagogically significant.
In fact, it claims that pedagogically the decade was among the best ever.
Robert Libman in Montreal Gazette You can learn a language pedagogically through the school system -the rules of grammar, and so on -but if you don't use it afterwards, it's going to get rusty at first, then dissipate over time,said Libman.
Frank Press in TheNewsTribune.com It's quite good pedagogically,said Frank Press, a geologist and past president of the National Academy of Sciences. "It captures the attention."
Steven Page in NPR We don't know if this is actually pedagogically sound practice that we're doing here, but it was fun for us,Page says.