New York Teacher Edition for Precalculus: Concepts and Technological Applications. Build conceptual understanding and mathematical fluency through short, focused instruction; step-by-step model problems, and relevant, real-world problems. Extensive problem sets provide an abundance of fluency practice, contextual problems, and performance tasks. Mathematical practices are imbedded throughout in student-friendly language. A wealth of teacher tools including enrichment activities, videos, simulations, and online practice and assessment.