Bachelor of education (B.ED) Arts (Computer Studies / Business Studies) is not very common for those universities that offer this combination or diploma institutions of the same.
If you have this combination or are pursuing the same, there is no need of panic. However there is one loop hole that you did not consider before enrolling for this course.
It is disgusting to learn that many public universities do not offer computer with any other combinations in their institutions which is common to private universities such as Mt. Kenya, Catholic and Gretsa. Maybe that is the reason why computer studies is limited with teachers across the country.