TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': ['templates/'],
        ...

import django.template.loader as loader
temp = loader.get_template('base.html')
return HttpResponse(temp.render())

Puedes añadir una template al directorio templates de la APP. Entonces símplemente has de hacer loader.get_template('the_concrete.html').

{% for work in "xxx" %}

{% endfor %}

Add a template in openawards/reusable/worklist.html:

<div>hola</div>

Then in another:

{% for work in "xxx" %}
{% include 'openawards/reusable/worklist.html' %}
{% endfor %}

You even can send parameters:

{% include 'worklist.html' with var_a='abc' var_b=123 %}