A Proposal for Assessing Imprecise Concepts in Spanish Primary and Secondary Schools. - Ángela Blanco-Fernández; Patricia Díaz-Díaz; Itziar García-Honrado; Ana Belén Ramos-Guajardo; Luis J. Rodríguez-Muñiz (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2016)