Citizens can certainly play a role in contributing to blue carbon accounting, conducting field assessments of blue carbon following a scientific standardized protocol and after being trained by professionals. In this module, we present a protocol to measure the sedimentary blue carbon to be conducted by teachers and their students. This initiative started in the ambit of an environmental education network for coastal ecosystem services, established in the Algarve region, southern Portugal, by researchers of the Marine Plant Ecology Research Group of the Centre of Marine Sciences of Algarve, together with local schools, ONGs and Environmental Education Centers.