With your help, we set up our equipment. A group of up to 75 students arrives. We give them a brief presentation of 2-5 minutes. Students are turned loose to work with experiments, with our supervision. 40 - 50 minutes is a good amount of time.
Students return to class.
The next group of students arrives, and we take it from the top. As soon as one group leaves, we are ready for another. We can see as many groups as time allows, with 45-60 minutes per group. We usually see most or all of the students in a school, in groups of 50 - 75, though smaller groups are better. We can work with groups of one age or with mixed groups.