The Manitoba Association of Basketball Officials have published some excellent training videos for minor officials including a scoresheet video, score clock video and shot clock video. These videos are based on pure FIBA rules, so there may be some variations for rules used in Ontario (such as the 35 second shot clock in high school etc.) however the basics are still the same and much can be learned from these videos.
All 3 videos (after a brief commercial) can be viewed directly below, or you can visit the MABO Website to view them or view them individually using this link on YouTube.
Thank you to the MABO for these and feel free to visit the MABO Website for more educational items.
MABO Minor Officials Training Videos