Previously, students had investigated seeds, planted them, observed growth and change, noted plant parts, and discussed the role of bees.
(students; had investigated; seeds; T:Previously) (students; planted; them; T:Previously) (students; observed; growth and change) (students; noted; plant parts) (students; discussed; the role of bees)
students students students students students
had investigated planted observed noted discussed
seeds T:Previously
them T:Previously
growth and change
plant parts
the role of bees