The general policy for late submissions is that 5% of your achieved mark will be deducted per day to a maximum of 15% for grades 9-10 and a maximum of 25% for grades 11-12 (DSBN policy). There may be exceptions to this, depending on the specific circumstances.
If assignments are posted online and can be done from home, absence due to a school activity does not extend the deadline.
If the situation warrants that an assignment can no longer be handed in, the mark will be a zero beyond that.
(You will only be given a reasonable amount of time to submit a late assignment. Don’t expect to be handing in assignments two or three weeks after they are due!)