00602nam a2200121Ia 4500008004100000100002200041245015800063245007600221260000900297300003500306440004300341650009600384171207s9999    xx            000 0 und d  aJitendra, Asha K. 2aA Randomized Trial of the Effects of Schema-Based Instruction on Proportional Problem-Solving for Students With Mathematics Problem-Solving Difficulties   cAsha K. Jitendra, Michael R. Harwell, Danielle N. Dupuis, Stacy R. Karl  c2017  apages 322–336, May/June 2017  aJournal of Learning Disabilitiesv50:3  aSCHEMA-BASED ISNTRUCTION, PROPORTIONAL REASONING; PROBLEM SOLVING; MATHEMATICS DIFFICULTIES