Young students analyzing water quality, ph level with indicator strips during biology field teaching class. Female teacher during outdoor active education about ecosystem, nature.
biology
boys
children
classroom
conservation
copy space
curiosity
ecology
ecosystem
education
elementary
environment
experiment
field
field teaching
girls
group
indicator strips
knowledge
lake
learning
meadow
memorable
nature
observe
opportunity
outdoor classroom
outdoor education
outdoors
ph level
plant
pollution
sample
school
science
showing
spring
students
studying
sustainable
teacher
teachers day
teamwork
trip
uncoventional
water
water quality
wildlife
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