Our colleagues Amy Syvertsen, Laura Wray-Lake, and Aaron Metzger have posted on the CIRCLE website a set of survey-based measures of civic engagement that they have carefully developed to be appropriate for kids all the way from fourth grade up to twelfth grade. Such measures are invaluable for assessing growth and learning. They are hard to develop, for reasons the authors describe on the CIRCLE website. Even just finding phrases that are appropriate for both children and older teenagers is a challenge. The new toolkit is the result of an intensive and highly professional project funded by the John Templeton Foundation, and it sets the standard.
See Civic and Character Development: Good Data Starts with Good Measures. The recommended citation for the toolkit itself is: Syvertsen, A. K., Wray-Lake, L., & Metzger, A. (2015). Youth civic and character measures toolkit. Minneapolis, MN: Search Institute.