Remember an author on a scientific paper should contribute to the science, not just pick up the moss. Soak it in a dish. Look at it under a scope. A whole micro-ecosystem is there. Add tardigrades to your classes by developing a simple project that can be repeated annually.
Tardigrades offer low cost, visible results, and great biology questions.
In addition, you teach sampling, field work, lab preparation, observation, measurement, identification, literature, and writing. References of this papers are available for further research.