Powershell Function to add a teacher as a co-teacher to all Google Classrooms of a given student. Function accepts piped objects with $SamAccountName parameter as the student.

Add-ClassroomTeacherToStudentsClasses.ps1

function Add-ClassroomTeacherToStudentsClasses {
    [CmdletBinding()]
        Param(
            [string]
            $Student,$Teacher,
           [Parameter(ValueFromPipelineByPropertyName)]
                $SamAccountName
        )

    $gamExeLocation = "\path\to\gam.exe"

    ##-- if no SamAccountName object was piped --##
    if($null -eq $SamAccountName){
        $SamAccountName = $student
    }

    . $gamExeLocation print courses student $SamAccountName state active | . $gamExeLocation csv - gam course ~id add teacher $Teacher

}