character: Coach Mark Johnson
topic: Physical activity and its impact on bone density in teenagers
grade: 9
subject: Science
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character: Dr. Sarah Wilson
topic: Nutrition's role in bone health for adolescents
grade: 9
subject: Science
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character: Ms. Emily Carter
topic: Exercise science and its effects on growth during teenage years
grade: 9
subject: Science
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character: Mr. David Kim
topic: Preventing osteoporosis through physical activity in youth
grade: 9
subject: Science
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