Their demand to include 'queer' content in the school curriculum is not the first campaign to involve Murray and Peter Corren. In 1997, the Correns challenged the school board of Surrey, British Columbia, on its decision to ban three books - all featuring same-sex parents of children in kindergarten and first grade. The school board banned the books and fought the case because it maintained the books were not suitable for children under six, and because some parents opposed homosexuality on religious grounds. The school board lost in the Supreme Court in 1997 after the judge ruled that all schools must be conducted in strictly secular and non-sectarian principles. The ruling was reversed on appeal, then ended up in the Supreme Court which, in 2002, ruled that the school board cannot ban the books. Chief Justice Beverley McLachlin wrote in the ruling that: 'Parental views, however important, cannot override the imperative placed upon public schools to mirror diversity of the community and teach tolerance and understanding.'