FAQ: Why are Assessments still editable for some teachers and not others?
There are two reasons why assessments can still be editable for some teachers and not others: 
  1. The teacher’s user has the Marks Full role, which grants them the ability to change assessments and marks outside of the date ranges set in the Marking Period Info.

  2. The teachers are teaching course sections in different divisions with marking periods that have different date ranges set in the  Marking Period Info.

See also
Marking Period Info    User    DAT   
PCR Educator K-12 School Information System is an online database engineered for independent and private schools to deliver the highest level of flexibility, unique experience, transparent communication and customized design. Being a complete cloud-based solution, PCR Educator system guarantees convenient access anytime, anywhere.