Namaste LMS Multisite

I need to collect all the grades of all sites in one place.

Suppose I have a parent site called “Desktop” and I have two childs sites, “Chemistry” and “Physics”

I need to know the grades of the child site “Chemistry” and “Physics” and those notes put them in the father “Desktop” sites.

Desktop
v
——————-
v v
Chemistry Physics
(Namaste Grades) (Namaste Grades)

I need to collect the grades and put them on the “Desktop” site.

Desktop -> Notes of Chemistry and Physics grades of My-gradebook.

as this would accomplish data capture (grades)?

Might you help me on this. I’m thinking I could get getting it from the database like this in the code namaste-lms.

but what I do not understand is how to loop to run in each database of all sites.