Multi-record tables, or "1:Many tables," are used when your organization needs to track many instances of the same thing, such as background checks, trainings, accounts receivable or progress reports. Your SAM site has several multi-record tables and forms already, including the Communications and Documents pages.
The parent education form above is an example of a multi-record form: each instance of training can be collected and viewed in one handy spot. You can even do fancy things like add totals and stats. Pretty neat, huh?
In order to create a new multi-record form, you'll first need to create a multi-record table. This tells SAM "hey, I need to collect multiple entries for each of these fields, so don't overwrite them!".