The easyCBM system doesn’t have a way for you to enter in data from outside the system. All of the easyCBM reports are tied to the easyCBM databases, which in turn are tied to the easyCBM assessments.
You do, however, have the ability to download a .csv file of any of the easyCBM reports, and you could enter the additional data from your district’s rubric into that file and use Excel’s graphing features to graph results. While not an ideal solution, it might, perhaps, be of some assistance to you.
To do a data export into a .csv file, first login to your account and click on the Reports tab, then go to the Groups tab. On the far right hand side there is a column called Data Export. If you select or highlight a group name, then click on the corresponding “Export CSV” link, a file will be downloaded to your desktop.