If they miscalculate, the astronauts will perish. If they calculate successfully, the astronauts and the students will enjoy a hero's welcome upon their return to earth. The students must take account of the motion of the moon, its distance from the earth, the effect of the earth's gravity and the moon's gravity. There is no minimum class size. One or two students from a single high school can be accommodated, since they study together over the Internet with students from other high schools.
Students can work at their own pace, as long as they are prepared for the scheduled exams.
Students working at home do not require classroom space. This online course is based on what has been learned by the researchers whose studies are documented in this list. A web site which I used in my class at San Jose City College last semester showing how the grades will be calculated for this course. The grades are updated frequently so the students can see at any time how they are doing and what they need to do to improve their grade. A description of my professional experience.