. . "Individualized instruction." . . . . . . . . . . "Preparing and using individualized learningpackages for ungraded, continuous progress education" . . . "Preparing and using individualized learning packages : for ungraded, continuous progress education" . . . . . . "Preparing and using individualized learning packages for ungraded, continuous progress education" . "Preparing and using individualized learning packages for ungraded, continuous progress education"@en . . . . . . . . . . . "Preparing and using individualized learning packages : for ungraduated, continuous progress education" . . . . . . "Preparing and using individualized learning packages for ungraded, continious progress education" . . . . . "Preparing and using individualized learning packages for undergraduated, continuous progress education" . . . . "Individuele onderrig." . . "Tecnologia Ensenyament." . . "Nongraded schools." . . "Didactische werkvormen." . . "Écoles par classes d'age." . . "Écoles par classes d'âge." . "Écoles privées." . . "Ensenyament, Sistemes d'" . . "Opvoedkundige vernuwings." . . "Enseignement individualisé." . . "Enseignement individualisé" .