Mount different Home Directorys for our Students

If the machines are AD bound you could just read the home directory from AD (provided it is specified there, usualy as SMBHome).
If you are using AD, you can use the following script on the login trigger and just leave the share blank and it will default to SMBHome as defined in AD. Scope as required to restrict where an who it will attempt to run for.
I usually also have it set on the Self Service trigger as well, that way if anyone needs to remount they can do it from there.
If your not using AD you will need another solution.
There are also several other ways of doing this if you look around the forums. If you don't have the info in AD you will probably need to do a bit of scripting to get the right server manually from the name.

#!/bin/bash
#2017 Version Samuel Look
#All care no responsibility
#Mounts the requested share if it doesn't already exist if left blank it will attempt to mount AD SMBhome
#Accepts shares in the form smb://server/share
#Intended to be run as a Login policy from Casper on AD bound machines only and has only been tested in this context.

##### Start seperate process #####
(

##### SUBROUTINES #####

Share_Path_Valid() {
if [[ -z "$Share_Path" ]]; then
Machine_Domain=$(dscl /Active Directory/ -read . SubNodes | awk '{print $2}')
Share_Path="$(dscl "/Active Directory/$Machine_Domain/All Domains" -read /Users/$Current_User SMBHome | awk '!/is not valid/' | sed -e 's/SMBHome: /smb:/g' -e 's/\\///g')"
fi
if [[ "$Share_Path" ]]; then
logger "Sharemount:$Share_Name Path check PASS $Share_Path"
return 0
else
logger "Sharemount:$Share_Name Path check FAIL"
return 1
fi
}

#####

User_Ready() {
Loop_End=$((SECONDS + 60))
Current_User=$(stat -f%Su /dev/console | awk '!/root/')
while [[ -z "$Current_User" ]] && [[ $SECONDS -lt $Loop_End ]]; do
sleep 10
Current_User=$(stat -f%Su /dev/console | awk '!/root/')
done
if [[ "$Current_User" ]]; then
logger "Sharemount:$Share_Name User check PASS $Current_User"
return 0
else
logger "Sharemount:$Share_Name User check FAIL"
return 1
fi
}

#####

Finder_Ready() {
Loop_End=$((SECONDS + 60))
while [[ -z "$(ps -c -u $Current_User | awk /CoreServicesUIAgent/)" ]] && [[ $SECONDS -lt $Loop_End ]]; do
sleep 10
done
if [[ "$(ps -c -u $Current_User | awk /Finder/)" ]]; then
logger "Sharemount:$Share_Name Finder check PASS"
return 0
else
logger "Sharemount:$Share_Name Finder check FAIL"
return 1
fi
}

#####

Not_Mounted() {
if [[ -z "$(mount | awk '/'$Current_User'/ && //'$Share_Name' /')" ]]; then
logger "Sharemount:$Share_Name Mount check PASS $Share_Name"
return 0
else
logger "Sharemount:$Share_Name Mount check FAIL already mounted"
return 1
fi
}

#####

Mount_Drive() {
True_Path=$(echo $Share_Path | sed 's//////'$Current_User'@/g')
logger "Sharemount:$Share_Name Attempting to mount $True_Path"
sudo -u $Current_User osascript -e 'mount volume "'$True_Path'"'
}

##### START #####

Share_Path=$4
Share_Name="$(echo $Share_Path | awk -F"/" '{print $NF}')"

if User_Ready && Finder_Ready && Share_Path_Valid && Not_Mounted; then
sleep 4
Mount_Drive
else
logger "Sharemount:$Share_Name Conditions not met to attempt drive mounting $Share_Path"
fi

##### End seperate process #####
) &

##### FIN #####