TL;DR
A section connects students, teachers and schedule rules. Create it once with a stable identifier.
Steps
Open Sections in Insights and search for the section before adding one.
With editing permission, create or open the section and check its name, identifier and grade information.
Assign the intended teachers and students.
Configure its schedules, save and inspect a member's planner.
For school-synchronized sections, update the owning system or coordinate an exception with the school. A local change may be replaced by the next import. Removing a section affects access and schedules; confirm its use before removal.
In Sections, use the row’s three-dot menu: Edit details for section settings, Edit schedules for periods, and Manage conflicts when available. Clicking the section name opens its overview.
Related help
Configure section schedules and resolve conflicts · Manage students and their section memberships · Manage teachers and co-teaching