v. — phrasal verb, Education, especially Ontario
to go over the answers to homework or a test, quiz or examination.
Type: 1. Origin — This sense of take up was identified as Canadian by virtue of frequency and most likely origin in Dollinger (2016). Originating in Ontario, the meaning is now found in other parts of Canada, but occurs only rarely in the US (see Chart 1). No connection to the UK or the US has been found, which makes this meaning Canadian by Origin (Type 1). Older uses may be traced back via present-day self-report surveys from elderly speakers, who would have used the construction when they were young adults. Such data (Dollinger 2016) dates the construction back to the 1950s, with the key factor being in residence at ages 6-22 in an area where this sense of take up is used.
See also COD-2, s.v. "take up (9)", which defines the term as, "go over the correct answers to (homework, an assignment, a test, etc.)", but does not label it in any way.
Images:

Chart 1: Take up #9 in North America (source: Dollinger 2016: Figure 1)
Table 1: Logistic regression testing with Ontario as the reference point, showing significant differences with all other regions (source: Dollinger 2016: Table 2)