New York is one of eight states providing information to a $100 million database of public school students from kindergarten through high school. In addition to names and addresses, medical info and test scores are included. New York City parents protested the sharing of children’s information without their consent.

Three years after releasing a report finding students at New York City charters schools perform better than their peers at traditional schools, a research center at Stanford University reached the same conclusions and gave high marks, especially, to gains made in mathematics.

Satisfaction is a metric the annual school surveys try to quantify. SchoolBook’s data reporter combed through recent numbers on the site’s satisfaction index. He found teachers are often less satisfied with a school than the parents. And School District 19 in outer Brooklyn scored the lowest average satisfaction in the city. Dive into the data yourself and share your findings, and questions.

Now that the city is measuring how well high schools prepare their students for college, the data reveals some schools post high graduation rates but very low college readiness rates. SchoolBook charted the 10 schools with the biggest gaps and found the difference between a graduation rate and a college readiness rate could be larger than 70 percentage points. But officials insist that doesn’t mean the schools aren’t serving their students.

A teacher questions the DOE’s reliance on school peer groups to determine progress report grades when the schools in his peer group share so little in common.

The 2012 school grades are now on our pages for all elementary and middle schools. The updated information is one of many data points on SchoolBook to help you compare and evaluate schools. Check it out.

Data on student discharges from both charter and district schools revealed lots of movement in the city’s epicenter of school choice: Harlem. SchoolBook’s analysis sparked debate over dumping and attrition, and it is still going. Join the conversation.

This interactive chart shows the movement of students between district and charter schools in three school districts in Upper Manhattan. It reveals a tremendous amount of mobility in Harlem, which has the highest concentration of charter schools in the city. It also seems to debunk the theory that charter schools “dump” low-performing students conveniently before test-taking time.

Grades are out for the elementary and middle schools. Based on last school year’s data, the results were relatively steady, with 86 percent of the schools not moving up or down by more than one letter grade compared to the year before. Still, 114 schools received C’s for the third year in a row, a jump from five that fell into the same category last year. In the past, schools that earned three C’s in a row were at greater risk for closure.

Reformists of different stripes staked out their territory on the air and online this week. And SchoolBook updated its data to reflect the latest scores, school numbers and survey results. Check out your school page.