Final answer:
In a group class beginning at 9 am with only 3 students on time, the class should be started as scheduled to respect the students' punctuality.
Step-by-step explanation:
If you're holding a group class that's scheduled to begin at 9 am and only 3 students arrive on time, you should start the class as planned. It is important to respect the punctuality of the students who arrived on time and not delay the schedule. However, you should also be prepared to accommodate the late arrivals by quickly integrating them into the class without disrupting the flow of the lesson. This approach adheres to the principles of responsibility and respect for time that are integral to the professional setting, just as employees are expected to show up to work for designated shifts unless they have a valid reason to be absent. The scenario described aligns with business standards of punctuality, collaboration, and maintaining order in public spaces like a cafeteria.