Checkley, K. (2006). The essentials of mathematics K-6: Effective curriculum, instruction, and assessment. Association for Supervision and Curriculum Development.
Chicago-Zitierstil (17. Ausg.)Checkley, Kathy. The Essentials of Mathematics K-6: Effective Curriculum, Instruction, and Assessment. Alexandria, Va: Association for Supervision and Curriculum Development, 2006.
MLA-Zitierstil (9. Ausg.)Checkley, Kathy. The Essentials of Mathematics K-6: Effective Curriculum, Instruction, and Assessment. Association for Supervision and Curriculum Development, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.