We are a group of teachers from Cairine Wilson Secondary School, Emily Carr Middle School, Henry Larsen Elementary School and Terry Fox Elementary School. We began our collaboration during the 2008-09 academic year as part of the OCDSB Math Gains project and have been lucky enough to continue our collaboration since then, with support from the board.

We wanted to work on something that would be of use to a broad range of teachers, students and parents from grades 6 through to grade 10 (approximately). In our discussions, we decided to focus on the meaning of operations (addition, subtraction, multiplication and division) through the grades. In looking at our target grades, we saw that students move from whole number to fractions to integers to algebra. Thus we decided to start with addition and subtraction and worked on 3 of the 4 topics.

Our work is meant to be a work in progress, many of the ideas that we came up with will not be fully developed (as we don't have an infinite amount of time). It is our hope that this will continue to grow with our group and others adding and developing these ideas as time goes on.

The material developed so far: