The employee record lists historical and scheduled qualifications and training (on the qualifications / training tab) and also those available courses that are not currently assigned to the employee (on the 'courses - ' tab)
To assign a course, click the assign to employee button on the relevant course row.
Most of this dialog will be pre-filled. All you have to do is enter the due date and click the Confirm button to finish.
The newly assigned course wil be added to the employee's qualifications / training tab list.
You can assign multiple courses to an employee at once by selecting more than 1 course record on the 'courses - ' list and then clicking the assign multi button at the top of the list. Then proceed as above to set the due date and confirm.
How to select multiple records: