Show all posts in a category

Is there a way to show all of the posts in a given category? My students are doing multiple posts in one category per week, but only since there are more than 9 posts per week (the number of posts I see on my screen view), the earlier posts essentially disappear, unless one searches for them in the archive. I’d like all posts to be viewable in a given category.

Here’s our site:
http://staceysloboda.com/

Can anyone help? Thanks.