add instructions for the instructors (#435)
add instructions for the instructors (#435)

* add instructions for the instructors

* delete checkpoint file

mbonsma/studyGroup,linamnt/studyGroup,linamnt/studyGroup,mbonsma/studyGroup,mbonsma/studyGroup,linamnt/studyGroup,mbonsma/studyGroup,mbonsma/studyGroup,linamnt/studyGroup,linamnt/studyGroup,linamnt/studyGroup,mbonsma/studyGroup