Approximately a third of my students are working through the Conservatory Canada syllabi. One way it differs from the Royal Conservatory is that keyboard harmony and transposition are built into the practical examinations. Regardless of which music conservatory you're following (if at all), being able to transpose at sight is a valuable skill to have in your "musician's toolbox" It's practical music theory! If you play for vocalists, I can guarantee you that you will need to transpose at some point - with very little preparation time. Here's a quick demo on how to practice transposing at the keyboard.