Sql-server – Joins on multiple tables

Given this schema, is it possible to produce an output wherein it shows all the User's assigned modules with its matching enrollment id if any, and NULL if none?

Users
+----+------+----------+
| id | name | group_id |
+----+------+----------+
| 1  | Carl | 1        |
+----+------+----------+
| 2  | Joe  | 1        |
+----+------+----------+
| 3  | Dan  | 2        |
+----+------+----------+

Modules
+----+---------+
| id | name    |
+----+---------+
| 1  | Alpha   |
+----+---------+
| 2  | Bravo   |
+----+---------+
| 3  | Charlie |
+----+---------+
| 4  | Delta   |
+----+---------+
| 5  | Echo    |
+----+---------+

Approved_Courses
+----+----------+--------+--------------+
| id | group_id | module | order_number |
+----+----------+--------+--------------+
| 1  | 1        | 1      | 1            |
+----+----------+--------+--------------+
| 2  | 1        | 2      | 2            |
+----+----------+--------+--------------+
| 3  | 1        | 3      | 3            |
+----+----------+--------+--------------+
| 4  | 2        | 1      | 1            |
+----+----------+--------+--------------+
| 5  | 2        | 3      | 2            |
+----+----------+--------+--------------+
| 6  | 2        | 2      | 3            |
+----+----------+--------+--------------+

Classes
+----+--------+
| id | module |
+----+--------+
| 1  | 1      |
+----+--------+
| 2  | 2      |
+----+--------+

Enrollments
+--------+----------+----------+
| id     | staff_id | class_id |
+--------+----------+----------+
| ENR-1  | 1        | 1        |
+--------+----------+----------+

My desired output would be below. I can't seem to do it without unnecessary duplicates and/or wrong information on enrollment.id

+----------+---------------+------------+---------------------+------------+
| users.id | user.group_id | modules.id | module.order_number | enrollment |
+----------+---------------+------------+---------------------+------------+
| 1        | 1             | 1          | 1                   | ENR-1      |
+----------+---------------+------------+---------------------+------------+
| 1        | 1             | 2          | 2                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 1        | 1             | 3          | 3                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 2        | 1             | 1          | 1                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 2        | 1             | 2          | 2                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 2        | 1             | 3          | 3                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 3        | 2             | 1          | 1                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 3        | 2             | 2          | 3                   | NULL       |
+----------+---------------+------------+---------------------+------------+
| 3        | 2             | 3          | 2                   | NULL       |
+----------+---------------+------------+---------------------+------------+

I would appreciate any help.

http://www.sqlfiddle.com/#!9/d3cc9d5/1