As it is presented here, these experiments are rather straightforward. That is mainly to save time and to give the students a good example of how fingerprints work. Besides that, the fingerprints taken will be used to identify persons in a later part of the subunit.
The next part (1.4) will give more freedom to the students.
Possible questions:
Discuss (and write down) which method to take fingerprints from a person you prefer. Explain why you prefer your method.
Describe a way to file the fingerprints from the students in your classroom.