MakeHomeDriveFolders.ps1

$Students = Get-ADGroupMember -Identity "Students" |Get-ADUser -Properties * 

$Directories = @(
    "Science",
    "Maths", 
    "English"
)

ForEach ($Student in $Students){
    
    #Test for home directory
    if (($Student.HomeDirectory -eq $null) -or ($Student.HomeDirectory -eq "")){
        Write-Host -ForegroundColor Yellow "$($Student.SamAccountName) Skipping as no home directory specified" 
        continue
    }

    #test if the folder exisits
    if (Test-Path -Path $($Student.HomeDirectory)){
        ForEach ($Directory in $Directories){
            #if the path does not exsit create it
            $FullPath = Join-Path -Path $($Student.HomeDirectory) -ChildPath $Directory
            if (Test-Path -Path $FullPath){
                Write-Host "$($Student.SamAccountName) $Directory already exisits"
            } else {
                New-Item -ItemType Directory -Path $FullPath -WhatIf
                Write-Host -ForegroundColor Green "$($Student.SamAccountName) $Directory Created"
            }
        }
    }else{
        Write-Host -ForegroundColor Yellow "$($Student.SamAccountName) $($Student.HomeDirectory) Does not exisit" 
    }
}