Join three tables using LINQ Query

Hello all,

I got stuck on how to write LINQ for joining three different tables as follows:

- tblStudent: student_id, school, class, grade

- tblAwards: school, class, grade, account_number

- tblAccount: account_number, scholarship_amount

Firstly to obtain school, class, grade from tblAwards via student_id between two tables tblStudent and tblAwards. Then get scholarship_amount by joining two tables tblAwards and tblAccount via account_number

 public static List<string> getScholarshipsAmt(string studentId)
        {
            using (DBEntities dbContext = new DBEntities())
            {
                var partialResult = (from stu in db.tblStudent
                                     join aw in db.tblAwards
                                          on new { A = stu.school, B = stu.class, C = stu.grade } equals new { A = aw.school, B = aw.class, C = aw.grade }
                                     where stu.student_id == studentId
                                     select new
                                     {
                                         aw.school,
                                         aw.class,
                                         aw.grade
                                     }).Distinct()
                                     .OrderBy(aw => aw.school).ThenBy(awa => aw.class).ThenBy(aw => aw.grade);


                var lstScholarshipsAmt = (from acct in db.tblAccount
                                    join aw in db.tblAwards
                                          on ...

				//Please help LINQ coding here
				???

                return lstScholarshipsAmt;
            }
        }

Thanks in advance.