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A school for children in the polygamous commune of Bountiful, B.C. is among the highest ranking on the 2011 Fraser Institute Report Card.

Bountiful Elementary-Secondary scored a perfect 10 mark.        

It tied with 12 other schools, mostly private schools in the Vancouver area, that also achieved perfect 10s.

The Fraser Institute rates 875 public and private elementary schools throughout B.C. based on 10 key indicators using data from province-wide testing, known as the Foundation Skills Assessment (FSA) test. FSA tests are mandated by the B.C. Ministry of Education.

Fraser Institute spokesperson, Peter Cowley, said not much is known about what made Bountiful so successful on FSAs.

"With regard to what techniques they may have used or how they taught in math, for instance, between kindergarten and grade 4, all those things may  be interesting but we don’t have any long term record of success yet," Cowley said.

Jane Friesen, the director of Simon Fraser University's Centre for Education Research and Policy, said people should look at these rankings carefully.

"It’s simply telling you how is a particular cohort of students in a school doing in a particular year.  I think we have to be careful to not interpret those results as a measure of the effectiveness of the school and I think that’s where the real issue comes in," she said.

Friesen said there are a number of factors that the rankings don't take into account, such as students' backgrounds.

The B.C. Supreme Court has been hearing testimony from Bountiful residents in recent weeks. It is examining the constitutionality of Canada's law against polygamy.