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Ability-tracking, instructional time, and better pedagogy 

, In: The American economic review / publ. by the American Economic Association
the effect of double-dose algebra on student achievement 
Cortes, Kalena E. ; Goodman, Joshua S.. (2014)  5 - p. 400-405
Exemplar:  Zentrale:E02 z vwl 001 jc/649; Zentrale:Magazin Zs fc 1649