TemplateStructure.html

course.php
    perch_template('content/courses/course.html', $Course);

perch/content/courses/course.html
    <!--* Shared scehma between event and course *-->
    <perch:template path="shared/event-course-schema.html" />

    <!--* Event-specific schema. Order attributes added to order these after the main title/subtitle/slug *-->
    <perch:content id="courseStartDate" type="date" label="Start date" suppress="true" order="4" />
    <perch:content id="courseEndDate" type="date" label="End date" help="" suppress="true" order="5" />
    <perch:repeater id="sessions" label="Sessions" max="15" scope-parent="true">
        <perch:content id="sessionDate" type="date" label="Date" format="j M y" suppress="true" />
        <perch:content id="sessionTitle" type="text" label="Session Title" suppress="true" />
    </perch:repeater>

    <!--*
        Start Template Output
    *-->
    <perch:template path="shared/event-course-layout.html" />

perch/templates/shared/event-course-schema.html
    <!--*
        Define the fields here, so they are properly ordered in the admin
        interface, without having resort to order=... madness
    *-->
    <perch:content id="title" title="true" label="Title" type="smarttext" required="true" suppress="true" order="1" />
    <perch:content id="subTitle" type="smarttext" label="Subtitle" help="This will appear inside the main title but smaller" suppress="true" order="2" />
    ... more fields ... 

perch/templates/shared/event-course-layout.html
    <!--*
    	Shared layout between a course and an event.
    *-->
    ... lots of html layout stuff ... then:
    
    <!--* ##### This isn't working ##### *-->
    <perch:template path="partials/_event-date.html" />

perch/templates/partials/_event-date.html
    ... event date stuff ...