ACS School Enrollment numbers consistently higher than local data

Hi -

I was comparing data from the ACS (https://data.census.gov/table/ACSST5Y2022.S1401?g=160XX00US2511000) and the MA Dept of Elementary and Secondary Education (https://profiles.doe.mass.edu/statereport/schoolattendingchildren.aspx) on school enrollment for Cambridge MA. The ACS numbers are consistently higher (well beyond the ACS MOE) than the state's numbers, though I believe I am looking at the same set (K-12, regardless of school type). Have others found this to be the case in other places? What could be the explanation?

ACS 5-Year K-12 School Enrollment (ACS) School Year K-12 School Enrollment (School Attending Children Report)
2006-2010                                                                    8,968  2009-2010                                                                                                                                      7,243
2016-2020                                                                    9,545  2019-2020                                                                                                                                      8,199
2018-2022                                                                    9,708  2021-2022                                                                                                                                      8,026