title: 'Left back' and the age-grade system: problem creation through problem solution.
authors.affiliation: University at Buffalo, State University of New York, Buffalo, NY, USA. psylevin@buffalo.edu
authors.forename: Murray
authors.initials: M
authors.lastname: Levine
authors.forename: Adeline
authors.initials: A
authors.lastname: Levine
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D004493:Education / Q000379:methods*; D004521:Educational Measurement / Q000379:methods*; D006801:Humans; D057766:Policy; D013334:Students; D013663:Teaching / Q000379:methods; D014481:United States