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Some Boston charter school leaders paid hefty salaries

Diana Lam of Conservatory Lab, earned more money than Boston Superintendent Tommy Chang, even though she oversaw a school of just 400 students. Lam, who retired in 2016, collected $275,000 in salary and an additional $23,000 for unused personal time off. –Pat Greenhouse/Globe Staff, file

The median pay package for the top leaders of the 16 charter schools in Boston was $170,000 last year, making most of them among the highest-paid public school officials in Boston, according to a Globe review of payroll data.

One charter school leader, Diana Lam of Conservatory Lab, earned more money than Boston Superintendent Tommy Chang, even though she oversaw a school of just 400 students. Lam, who retired in 2016, collected $275,000 in salary and an additional $23,000 for unused personal time off. Chang received $272,000 in total compensation.

The Globe review offers a rare examination of payroll records at the city’s 16 independently run charter schools — public institutions that are overseen by state education officials and operate as separate government entities from the city.