Show a field of a modelformset as a value

Show a field of a modelformset as a value

I've got the following generating and displaying a formset:
SessionPlannerTraineeFormSet = modelformset_factory(
PerformedLesson, fields=['trainee', 'lesson', 'instructor'],
)
performed_lessons_formset=SessionPlannerTraineeFormSet(
queryset=PerformedLesson.objects.filter(session=self.object),
)
<table class="table">
<tr><th>Trainee</th><th>Lesson</th><th>Instructor</th></tr>
{% for form in performed_lessons_formset %}
<tr><td>{{form.trainee}}</td><td>{{form.lesson}}</td><td>{{form.instructor}}</td></tr>
{% endfor %}
</table>
I'd like the trainee just to show its value. I've tried
{{form.trainee.value}}, however because trainee is a ForeignKey to a user
all I get is the pk of that user as that's whats being fed to the HTML
<select>.