Teacher showing sample of lake water to school children, during field teaching class. Outdoor active education helping young student to learn about

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Teacher showing sample of lake water to school children, during field teaching class. Outdoor active education helping young student to learn about ecosystem, nature.

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Size: 5568px × 3712px
Photo credit: © Jozef Polc / Alamy / Afripics
License: Royalty Free
Model Released: Yes

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