This is the query I am using
SELECT Student_Course.MailMerge, Student_Course.FieldPlacementID, Student.Fname AS StudentFirstName, Student.Lname AS StudentLastName, FAST_StudentAddresses.Term, FAST_StudentAddresses.[Email Address] AS StudentEmail, AgencyInformation.Agency, AgencyInformation.Address, AgencyInformation.CityID AS City, Contact.FirstName AS ContactFirstName, Contact.LastName AS ContactLastName, Contact.Phone AS ContactPhone, Contact.Ext AS ContactExt, HyperlinkPart([Contact].[Email],1) AS ContactEmail, Student_Course.SentStudentConfirmation, Student_Course.SentAgencyConfirmation
FROM (Contact RIGHT JOIN (AgencyInformation RIGHT JOIN (Student RIGHT JOIN Student_Course ON Student.StudentID = Student_Course.StudentID) ON AgencyInformation.AgencyID = Student_Course.AgencyID) ON Contact.ContactID = Student_Course.ContactID) LEFT JOIN FAST_StudentAddresses ON Student.StudentID = FAST_StudentAddresses.[Spriden ID]
WHERE (((Student_Course.MailMerge)=True) And ((Student_Course.FieldPlacementID)=Forms!Menu_StudentFieldPlacements!cboFieldPlacement) And ((FAST_StudentAddresses.Term)=Forms!Menu_StudentFieldPlacements!cboTerm));

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Reply from Alex Hedley:

That contains a few parameters
  Forms!Menu_StudentFieldPlacements

Did you try the suggested article?