4McTighe, J. & Wiggins, G. (1999).The Understanding by Design Handbook, Alexandria. VA:Association for Supervision and Curriculum Development. 7, 12.17. 19. 9-16. 19. 12. 8
5Robert J. Marzano, Ronald S. Brandt. (1988). Dimensions of Thinking: A Framework for curriculum and Instruction.Association for Supervision and Curriculum Development, 23