Hello,
The Math program has been recently updated to meet the new learning outcomes of the BC curriculum. The Grade 3 (i am assuming you are talking about Grade 3 in the Maple Leaf School and not the Korean Grade 3) program does not have a text book but only a teacher's guide and a workbook. Much of the primary program is not delivered through textbooks as this kind of learning is not effective for this age group.
The new program is currently on order and will not arrive until September. If the student has taken math in Korean, they should have no problem with the entrance exam. Are they entering the Foreign Nationals School?
My recommendation is to look at what needs to be known for their age group and gather practice for those topics. You can find that at this link:
http://www.bced.gov.bc.ca/irp/mathk7/23numnc.htm
I hope this helps.
ADI
