Finding Equations of Parallel and Perpendicular Lines

The Mathematics Design Collaborative (MDC) brings to mathematics teaching and learning high-quality instructional tools and professional support services that play a pivotal role in helping the Bill & Melinda Gates Foundation realize its ambitious goal of having 80% of low-income and minority students ready for college by 2025.

Ensuring all students are prepared to succeed in college and career is at the heart of the Common Core State Standards. As teachers work hard to find ways to help all students reach these expectations, we’re working to ensure that there are high-quality instructional materials available that have been developed by teachers for teachers.

Much has been written and debated on the state-led shift toward more rigorous, consistent K-12 education standards commonly known as Common Core. At the same time, that intense focus on the standards has obscured an equally important shift – the adoption of instructional resources aligned to the new standards.