In the Netherlands, students with intellectual disabilities (ID) attend practical education (PE). Teachers generally use demonstration as a form of direct instruction (DI) and students have difficulty working independently. Strategy instruction (SI) is a question-answer-based method that stimulates students' autonomy by getting them to verbalize…

The purpose of this study is to compare the efficacy of three different approaches to professional development in Earth science education: preparing teachers to "adopt" expert-"design" curricula; preparing teachers to use a principled approach to design curricula; and preparing teachers to use a principled approach to "adapt" curricula. The claims…