I just spoke with someone who downloaded the data sets and updated student activity guidefor the Data Management Backpack since the first of the year and it appears that the 12 Acme GL data files are missing. We are working to get those uploaded into ApptioU... they should be loaded by end of day today(1/5), so you can re-download them. In the meantime, if you are missing the ACME GL files, you can get them attached here. This file only contains the missing files. Your other files should be valid.