Create A Cursor Inside A Sproc

I try to create a Sproc which will use a cursor to retrieve a few rows from a table. But the cursor part has given me problem. Here it is:


StudentInfo
StudentID StudentName DeptID
101 John 10
102 Alex 10
103 Beth 20
ClassInfo
ClassID DeptID
901 10
902 10
225 20
I want to create a Sproc which will retreive the student's classes in DeptID 10

Following is the Sproc and cursor:

use master
go
Create PROCEDURE [dbo].[getEnclishClasses]
@StudentID int
AS
Declare @printInsertStatement nvarchar(100)
ECLARE NewRowID int

Declare classCursor CURSOR FOR
SELECT ClassID, DeptID FROM [myTest].dbo.ClassInfo
WHERE DeptID=(SELECT DeptID FROM [myTest].dbo.StudentInfo
WHERE StudentID=@StudentID)

DECLARE @ClassID INT
DECLARE @DeptID INT

OPEN classCursor
FETCH NEXT FROM classCURSOR INTO
@ClassID, @DeptID
WHILE (@@FETCH_STATUs=0)
BEGIN
PRINT 'SET @newID = Scope_Identity()'
SET @printInsertStatement=
(Select 'INSERT INTO [myTest].dbo.ClassInfo (ClassID, DeptID) Values('
+CONVERT(NVARCHAR (10), @ClassID) + ','
+CONVERT(NVARCHAR (2), @DeptID)+')'
FROM [myTest].dbo.StudentInfo
WHERE DeptID=(SELECT DeptID FROM [myTest].dbo.StudentInfo
WHERE StudentID=@StudentID))

PRINT @printInsertStatement
END
CLOSE classCursor
DEALLOCATE classCursor
EXEC getEnclishClasses 101

Here is what I try to get (text with actual data from the table):
SET @newRowID = Scope_Identity()
INSERT INTO [myTest].dbo.ClassInfo VALUES(901, 10)
SET @newRowID = Scope_Identity()
INSERT INTO [myTest].dbo.ClassInfo VALUES(902, 10)

Here is what I had got (returning multiple lines, more than number of records I have):
Msg 512, Level 16, State 1, Procedure getEnclishClasses, Line 19
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Thanks in advance for your help! Or is it a better way (not using a cursor). Each table has over 5,000 records.