If your sibling is currently attending middle school, you will select elementary school for the "Highest level of schooling" question when you click "Add Sibling." In this case, elementary school will have been the last level of education completed.
If your sibling is currently attending middle school, you will select elementary school for the "Highest level of schooling" question when you click "Add Sibling." In this case, elementary school will have been the last level of education completed.