How we do it currently. The parent selects the grade that their child is CURRENTLY in, and in the next question we display all of available grades. This is where parents are selecting the wrong grade. Which causes problems later in the lottery.
Proposed change. Here we take the selection that the parent made in the first question, and use the response to constrain the choices so there are fewer options to select from, this will make it is less likely that the parent makes the wrong selection.