I spent most of this afternoon proof reading the annual reports from the Senior Verifiers for my subject areas. I'll post something about these reports later, but one comment seems particularly appropriate at this time of the year.
The Senior Verifier for Computing commented that "there were several instances of centres not using the latest versions of unit specifications". It's pretty fundamental that you are using the latest unit spec. You should download the current version of unit specifications from the SQA website. You can search for HN units here or NC units here. We also maintain a list of changes to HN units here. Please check you're teaching the right unit!
The EV reports are published later in the year.