When I was in my teens one of the things I was interested in was natural history. I was a keen contributor to the mammal society records.
To do this when ever I saw a mammal or a sign of one I would take a note. Later on I would complete a record sheet using an ordnance survey map to add the location. Every so often I would post these off by snail mail to the mammal society.
My technology was a pencil and notebook OS maps and a few books on identifying mammals by their bones, tracks and sign. I’ve still got the OS map with faint pencil scratching but the notebooks are long gone.
Now on my phone I have the Mammal Tracker App. Whenever I see an animal or sign of one I record that immediately. I can add a picture and the app will record the location. I send it to the mammal society with the click of a button.
This really lowers the bar for citizen science. I would imagine that this would be a great type of project to run in school.