iNaturalist has a primary-friendly version called Seek.
Only available on IOS not Andriod, so have not used it.
https://itunes.apple.com/us/app/seek-by-inaturalist/id1353224144?mt=8

I have used both Nature's Notebook and Project Bud Burst with home school students. The older children can do the reading and enjoy the data input/tech part of these projects. I will have them join me in Cornell Labs' Great Backyard Bird Count this Feb since we have a bird watching garden here at our nature center and birds are so captivating for youth.
Adults have also come for citizen science programs monitoring water life, blue bird trails and trees. Small groups have participated but it is a great opportunity for those dedicated participants to have a hand in real science!

I know that Cornell has a Citizen Science site and bird related programs across grades. I am going to start doing the Great Backyard Bird Count Day, usually in February, with my students in a science notebook set aside for this purpose. This way, the data they'd normally write in their notebooks stays in my bird count journal. Eventually, it will offer some opportunities to read scientific field recordings, analyze and interpret data over the years.

Links: Cornell's Citizen Science Programs

Links: Great Backyard Bird Count

I plan on using inaturalist with 3rd grade students to conduct citizen science in San Diego. Is your citizen science unit completed? Do you have any recommendations on where to find citizen science projects for young children? (K-3)?

Another source for some citizen science ideas is an NSTA book called, Citizen Science, edited by Nancy Trautmann, Jennifer Fee, Terry M. Tomasek, and Nancylee R. Bergey. I just purchased the book and there are quite a few great ideas for outdoor citizen science experiences. Unfortunately, I have not yet had the opportunity to try any of them, but that is something that I will be incorporating and planning for next school year.

I have had success with Nature's Notebook with my 7-8th grade after school ecology club. Students have been taught the basics of phenology, and they are excited that the data they enter on species around the school is part of a national network of data. I have used it as a springboard to talk about climate change. I will check out inaturalist, thanks for the suggestion.

Have you considered a problem based learning approach where students determine what they want the end product should be. I haven't done it with a nature project but have worked with a group in a summer academy for a citizen project to bring awareness for the need for AED's in our community. Students have structured lessons early on and then teaching is shifted to the student and they develop a strategy to communicate their findings. Some choose the comfortable path like a ppt but some made amazing videos and posters.

Hi Laura!

I'm Catherine, from Mexico

I'm working linking citizen science and environmental education too; I began with the monitoring of urban birds, I have used applications such as Merlin, and urban bird guides created by the Cornell Ornithological Laboratory and CONABIO (CONABIO, is a commission in Mexico that disseminates information about our biocultural collection). This practice has opened the door for my students to start noticing more living beings around them. From the beginning, they showed a lot of enthusiasm! and I am very clear that it is because it leaves the topics that they normally see in their science class. With the passage of time, I have begun to notice that their work proposals are already focused on how we can help conserve, not only birds but also other species, to create green areas and I am very excited when they tell me the actions that They make from home in favor of the care of the environment. Good luck with your projects!

Photos: https://dev7.naaee.org/system/files/harmony/images/pktc2067.jpg