In My Opinion: Professing Teacher Knowledge beyond the Classroom Walls
In rooms a bit smaller or larger than 24' × 30', millions of schoolchildren across the country learn valuable mathematics from teachers who masterfully integrate knowledge of mathematics, curriculum, and students to enact high-quality instruction. One of the biggest challenges to improving mathematics education may lie not in standard-setting, teacher recruitment, or accountability but in encouraging mathematics teachers to share their knowledge and practices with those outside the 24' × 30' space in which they teach every day. Teachers tend to treat their knowledge of teaching in ways that remove it from benefiting the profession (Shulman 1993). What teachers know and can do certainly impacts the hundreds, and possibly thousands, of students they teach over the course of their careers. Imagine the impact if mathematics teachers routinely shared their complex, refined understandings of teaching in ways that could be built on to benefit other students and teachers. If we hope to ensure NCTM's vision of quality mathematics instruction for all students, we must move beyond the private production and possession of mathematics teaching knowledge.