Spirit of Math Schools has donated the following historical contest papers for WMO Canada competitors to study from. Spirit of Math Schools writes contest papers for grades 1-4, and therefore there are no L2 papers to study from.

L1 - Spirit of Math International Contest Grade 3 2006 - Answers 
L1 - Spirit of Math International Contest Grade 3 2007 - Answers 

L1 - Spirit of Math International Contest Grade 4 2006 - Answers 
L1 - Spirit of Math International Contest Grade 4 2007 - Answers