foreach(\App\Models\Tenant::all() as $t) {
    tenancy()->initialize($t);
    echo $t->id . ' grades: ' . \App\Models\Grade::count() . "\n";
    $grades = \App\Models\Grade::all();
    foreach($grades as $g) {
        echo "  - " . $g->id . ": " . $g->name . "\n";
    }
}