There are two different KDL courses - the New Course and the Original Course.
The New Course uses modern methods to teach spoken and written Cornish in a lively style, emphasising everyday spoken Cornish. There are Conversations, Grammar Notes and Exercises. You practise your spoken Cornish and then send your written work to your tutor either as a regular email or as an attached Word or text file. There are also conversation practice sheets for some lessons.
The New Course is available in the Standard Written Form of Cornish (Furv Skrifys Savonek - FSS) and Common Cornish (Kernewek Kemmyn - KK). FSS is the standard spelling system for use in public life and schools. There are currently more books and other written material available in KK. The two forms are very similar.
The Original Course has more emphasis on grammar and the written language. It is available only in Kernewek Kemmyn. You practise your conversation, then e-mail your answers and your exercises - either as a regular email or as an attached Word or text file - to your tutor.