Checkley, K. (2006). The essentials of mathematics, grades 7-12: Effective curriculum, instruction, and assessment. Association for Supervision and Curriculum Development.
Citace podle Chicago (17th ed.)Checkley, Kathy. The Essentials of Mathematics, Grades 7-12: Effective Curriculum, Instruction, and Assessment. Alexandria, VA: Association for Supervision and Curriculum Development, 2006.
Citace podle MLA (9th ed.)Checkley, Kathy. The Essentials of Mathematics, Grades 7-12: Effective Curriculum, Instruction, and Assessment. Association for Supervision and Curriculum Development, 2006.
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