Blog archive for specified section

Hey,

I have two sections for my blog. How do I separate my archive to only show section-specific information?

For example, I want to do something like:

perch_blog_custom(array(
    'filter' => 'postDateTime',
    'section' => 'school-news',
    'template' => 'month_year.html',
));

Though this method doesn't actually seem to work.

Thanks, J