Tutors on the other hand bear their own overheads , such as advertising and promotion expenses ; many hire assistants to research course materials and to answer students ' queries .
Tutors are independent contractors to cram schools , who share their revenue with tutors .
Tutors bear their own overheads , such as advertising and promotion expenses ; many hire assistants to research course materials and to answer students ' queries .
Tutors are independent contractors to cram schools , who share their revenue with tutors .