How to use AlertUtils.loop to get all Active Learners of an Offering in single email?

This is the code that is being used in Template to send email to Instructor, however it sends separate emails per Learner of the Offering instead of consolidating all Learners in one Table in one email.

<table>

${AlertUtils.loop('learnerLearningRecords','<tr><td>$AlertUtils.person{learnerLearningRecords.assignedToId).DisplayName}</td></tr>')}

</table>

Please suggest an alternative/correction.

Thanks!