The roles identified by the National Open University of Nigeria (NOUN) for CLL as knowledge provider, resource training capacity builder, and catalyst for collaboration, are focused on the following two curriculum delivery modes: 
i.    Open and distance learning policy: Continuous advocacy and promotion of open and distance learning (ODL) as a major strategy for ensuring equal and equitable access to education for all registered students and eventually to all Nigerians        who are desirous of achieving functional knowledge and skills. 
ii.   Open and distance learning systems development: The CLL open and distance learning (ODL) systems are built and supported by adequate infrastructure and skilled workers. This combination is expected to assist the students to build effective and efficient systems for sustainability and good practice. 
iii.   In all essentials, the CLL open and distance learning approaches have the common ODL attributes and characteristics including: 
(1) Open Learning 
(2) Distance Learning 
(3) Flexible Learning 
(4) On-line and e- learning and 
(5) Virtual Learning which are applied as and when necessary.
Once enrolled in any CLL programme, students will have direct e-mail access to Course coordinators/facilitators, and they will be able to discuss their questions and problems with fellow students at Discussion/ Study Groups.

CLL examinations which are computer-based for the strictly academic programmes are written at approved NOUN Centres. Students will be evaluated in all courses registered for whether practical, theory or project work. The project report is presented in the form of a Long Essay while for the Medical Office Practice (MOP) programme, it is an internship report. Both the Long Essay and the Internship Report are submitted to the Centre through our specially designed leak-proof arrangement, beginning with the Study Centre Director, for marking. For the courses that use the distance learning approaches, there are three components making up assessment:

a. The Self-Assessment Exercises (SAEs) are questions within each unit of the study material. These are designed to gauge the learner’s understanding of the concepts in the unit. It is non-grading; that is, it does not add up to the grade in the course. It is advisable that though answers to these questions do not add to your overall grade in the course, all the questions should be attempted. 

b. The Tutor-Marked Assignments (TMAs) are about four (4) for a whole course. They are to be answered, and then graded. The grades for the best three assignments will be used for the assessment. The TMAs constitute 30% of the total marks for      each course. 

c. The end-of-semester examination is the third component and constitutes 70% of the total for each course. The period/dates for the examination may be different from the scheduled end-of- semester examination period.