In 2008 and 2012, Pioneer Institute published reports documenting declines in enrollment in Massachusetts' public schools. At the time, enrollment had fallen by about 35,000 students over a decade, or roughly 0.5 percent per year, with especially large drops in western Massachusetts and parts of Cape Cod. This paper examines enrollment trends since that time in three main sections. The first section continues the analysis from the prior papers and describes changes in enrollment during the 2010s. The second section evaluates the impact of COVID, using data from 2020 through this school year that the Department of Elementary and Secondary Education (DESE) published in December 2022. The final section offers cautious predictions for the next decade.