1. Create a constituent query
Criteria:
constituent code equals [current parent]
And
relationships, individuals, education, class of one of ....

2. Create a constituent export to excel
Include the query
Output:
constituent information, name
relationships, individuals, name (export more than 1 relationship per constituent and filter on the same specific class years as the query)

3. Within the export, parents with more than one column containing student names have multiple children in those class years