Search Filter using lamba or linq - group by & take top record for each group.

Hello,

I am having some difficulties with getting the correct statement in lambda or linq.  


SQL Query
select count(me.schools_id) as numOfStudent, schools_name, members_exams_examdate
from members_exams as me
join schools as s on s.schools_id = me.schools_id
where members_exams_examdate = '8/19/16'
group by s.schools_id, members_exams_examdate, schools_name



This returns
+----------------------+---------------------------+-----------------------------------------+
|numOfStudent |  School Name       |  members exams examdate |
| 1                         | School A                |  8/19/2016                                |
| 4                         | School B                |  8/19/2016                                |
| 7                         | School C                |  8/19/2016                                |
| 21                       | School D                |  8/19/2016                               |
+-----------------------+---------------------------+----------------------------------------+


Controller:   Try1

	public ActionResult Index(string searchBy, string search)

			{
				DateTime convertedSearch;
				DateTime.TryParse(search, out convertedSearch);

					if (searchBy == "members_exams_examdate")
					{

						return View(from x in db.members_exams
									where x.members_exams_examdate == (convertedSearch)
									group x by x.schools_id
										into groups
										select groups.OrderBy(p => p.school.schools_name).First());

					
					}

					return View();
			}

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Return Error: The method 'First' can only be used as a final query operation. Consider using the method 'FirstOrDefault' in this instance instead.

Try2:   using  FirstorDefault

select groups.OrderBy(p => p.school.schools_name).FirstorDefault());

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Return Error: Error      1      'System.Linq.IOrderedEnumerable<Data.members_exams>' does not contain a definition for 'FirstorDefault' and no extension method 'FirstorDefault' accepting a first argument of type 'System.Linq.IOrderedEnumerable<Data.members_exams>' could be found (are you missing a using directive or an assembly reference?)      


Try3:

	return View(from x in db.members_exams
									where x.members_exams_examdate == (convertedSearch)
									group x by x.schools_id into y
									select new
									{
										schools_id = y.Key
									});

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Error: The model item passed into the dictionary is of type 'System.Data.Entity.Infrastructure.DbQuery`1[<>f__AnonymousTypef`1[System.Nullable`1[System.Int16]]]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[Data.members_exams]'.

In the view I would like to group the records and display only the top record for each school.  Just like to table above.


I have tried a number of different things but no success.  

Thanks for the help.