Laravel: How can I use Group By within my view? - laravel-5

Question

I am trying to get all students, then group them by graduation year. Within my view, I want to have a headline of the year:
<h2>2016</h2>
<ul>
<li>Last, First</li>
...
</ul>
<h2>2017</h2>
<ul>
<li>Last, First</li>
...
</ul>
I believe I am close, but not sure of the "Laravel way". The data looks good - as in, the query is getting/grouping correctly, I think my struggle is understanding how to loop through the collection.
MyController.php
public function index()
{
$students = Student::all()->groupBy('grad_year');
return view('student.index', compact('students'));
}
In my view I can see I am getting this:
MyView.blade.php
{{dd($students)}}
Collection {#178 ▼
#items: array:2 [▼
2016 => Collection {#173 ▼
#items: array:3 [▼
0 => Student {#180 ▶}
1 => Student {#181 ▶}
2 => Student {#182 ▶}
]
}
2017 => Collection {#172 ▶}
]
}
SOLUTION
Here is what my view looks like to get the output I wanted.
MyView.blade.php
#foreach ($collection as $year => $students)
<p>{{$year}}</p>
<ul class="list-unstyled">
#foreach($students as $student)
<li>{{ $student->last_name }}, {{ $student->first_name }}</li>
#endforeach
</ul>
#endforeach

Answer 1

something like:
$studentsByYear = $students;
foreach ($studentsByYear as $year => $students) {
echo "<h2>$year</h2>";
echo "<ul>";
foreach ($students as $student) {
echo "<li>".$student->name."</li>";
}
echo "</ul>";
}