Per the following community post: https://community.blackbaud.com/forums/viewtopic/535/49138

We built our rosters based on the grade level criteria but in the child's actual record we have the grade level assigned to them based on their birthday. We built our grade level rosters based on birthday because we have parents who "hold" kids back in kindergarten or 1st grade here in Texas.

Plus, the promotion is based on grade levels. We are fine with birthdays not being on the tag but our teachers and volunteers would like the birthdays somewhere they can get easy access to and really that would leave adding it to the printed rosters. Sometimes kids get inadvertently added to the wrong classroom and knowing their birthday is an easy double check. Some of our younger classes are split up within the year. So we will have two 3-year classes instead of one and we determine which grade level the child is in based on their birthday. 

Currently I cannot create a list based on grade level (that will pull from the child check-in tab). So if you can get me a way to create a list based on grade level - and not the grade level that is a "custom tag" - then it would solve my problem.