General help

Hi all

  I have rather strange question I hope some one can answer it

I have 2 e-learning courses but I dont want to run them on timely basis.

I want course of particular student to start when he joins in & then he proceeds learning 10 lessons & taking assignments.

I want assignments/lessons dates to be such

If MR. A joins on jan1 his 1^st assignment will be on 10^th

Same cource MR. B joins  on jan 5 then his 1^st assignment will be on 15^th

Any one help?

Regards

Nikhil