Checkley, K. (2008). The essentials of social studies, grades K-8: Effective curriculum, instruction, and assessment. Association for Supervision and Curriculum Development.

Checkley, Kathy. The Essentials of Social Studies, Grades K-8: Effective Curriculum, Instruction, and Assessment. Alexandria, Va.: Association for Supervision and Curriculum Development, 2008.

Checkley, Kathy. The Essentials of Social Studies, Grades K-8: Effective Curriculum, Instruction, and Assessment. Association for Supervision and Curriculum Development, 2008.