This document discusses hands-on exercises for teaching astronomy concepts. It introduces CLEA (Contemporary Laboratory Experiences in Astronomy), a project that provides modular laboratory exercises using simulations and real data. The exercises are designed for non-science majors and illustrate modern astronomical techniques and data analysis. Some example CLEA modules measure star properties, study star clusters using the H-R diagram, and determine the speed of light using observations of Jupiter's moons. The goal is to provide an interactive, hands-on experience of what astronomers do through measurement simulations and analysis of real astronomical data sets.