To purchase the course, you need to become a registered user. You can register in the section Registration::New student.

After the registration is completed, you may proceed to the purchasing procedure in the section Payment:Buy orders.  When you fill in your order form, please, follow the instructions given at the top of every page.

Having purchased a unit / units and tutorship (if applicable), you will receive a letter of information with your key number (e.g.  {"61d9b5a4-f82c-4693-bdc3-21629a2b47f3"}). You will need to enter the key number in the section Payment::Activate key. After that you will get access to the units you purchased for the period of time you paid for.

NOTE: You may see all the information about all your order(s) in the section Payment::Your orders.