> Does that mean that the admin will have to manage dob of every student when creating accounts ?

That already happens to some extent although the mechanism by which this happens might depend on the school district, etc. The `dateOfBirth` LDAP attribute is probably the most obvious method (which admittedly should probably not be used due to the ease in accessing this info in the default configuration) but there are others.

In secondary school when my account was set up we were told that our initial password (that we had to change on first logon) was our DOB