For teaching resources see Blog at http://www.theconservatoryofmusic.ca This video is about Transposing Orchestral Instruments for the Advanced Rudiment Exam. Students tend to have problems with this question as they over think it.
Treat each question as an interval question. When transposing orchestral instruments such as Bflat Clarinet, French Horn in F...these instruments sound lower when being played.
To play in concert pitch, e.g. the piano has to transpose the piece being played lower so that both instruments sound the same.