This document discusses selecting educational environments and participants in curriculum development. It notes that the learning environment should challenge students and make them feel safe. Various criteria for effective educational environments are discussed, including adequacy, suitability, efficiency and economy. The document outlines many participants that should be involved in curriculum development, including teachers, students, principals, curriculum specialists, superintendents, boards of education, and the federal government. It emphasizes that teachers should play a central role as codesigners and coresearchers, and that students should have a voice. Overall participation from various stakeholders is important for developing quality curricula.