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Deyaa Thamer Mutar, Ahmed Hasan Oleiwi AL_khuzaie, Mohammed Abd UL-Rahman Mohammed. THE EFFECT OF AN EDUCATIONAL CURRICULUM ACCORDING TO THE OVERLAPPING WAVES STRATEGY ON COGNITIVE ACHIEVEMENT AND LEARNING THE SKILL OF CRUSHING VOLLEYBALL FOR STUDENTS. Galaxy int. interdiscip. res. j. [Internet]. 2023 Nov. 18 [cited 2024 Oct. 4];11(11):286-300. Available from: https://internationaljournals.co.in/index.php/giirj/article/view/4588