character: Coach Mike Stevens
topic: Effects of exercise on bone strength
grade: 9
subject: Science
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character: Dr. Emily Johnson
topic: Nutrition and bone health
grade: 9
subject: Science
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character: Mr. James Lee
topic: Types of exercises for improving bone density
grade: 9
subject: Science
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character: Ms. Sarah Kim
topic: Understanding osteoporosis and its prevention
grade: 9
subject: Science
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