Bugscope provides free interactive access to a scanning electron microscope . Several sessions are upcoming and you can log in as a guest. Classrooms can also sign up to send bugs and participate in the scan! They have already completed over 300 sessions with over 200 schools.
Applications for Science Teachers: This seems like a great opportunity to collaborate with working scientists. There are great images for learning about observation skills, microscopy, and parts of living systems. Much more here to uncover.