On February 18, 2015, the New York State Education Department (NYSED) conducted a Performance Level Description Development meeting in Albany, New York. The meeting was convened to articulate the knowledge and skills expected of students at each level of performance, consistent with the policy vision set forth by the NYSED. The Performance Level…

In 1981 a nationwide assessment of achievement in writing geometry proofs was conducted by the Cognitive Development and Achievement in Secondary School Geometry project. Over 1,500 students in 11 schools in 5 states participated. This paper describes the sample, instruments, grading procedures, and selected results. Results include: (1) at the…

The effects of a mathematics lesson's complexity were studied, using 128 female and 122 male first-year algebra students in Georgia high schools. Achievement scores were slightly, but not significantly, higher with low complexity lessons, and students preferred the low-complexity lessons. Implications for teaching secondary mathematics are…