We just added a few sinks for tables that you might find useful.
cellSuffix: shows a suffix on the right side of a cell. Only shows up when the student focuses into the cell, or when the cell has content. Recommended if you ever want students to enter a unitted number (“ft”) or a percent ("%"). Let us know if you find other uses!
cellErrorMessage: shows an error with a tooltip to the student. Recommended if you’re trying to parse their work but can’t. Note: this sink is different from the “warning” sink, which shows an error to the teacher. This is just student-facing.