Hi, thanks for the question.
For anyone unfamiliar, the grammar bank is here:
http://www.japanesepod101.com/learningc ... rammarbank
You can search for entries in the grammar bank by JLPT level (Japanese Language Proficency Test), Level on this site, Romaji (the roman letter with which the entry begins), or by category. Just click on the drop down menu and select what you'd like by clicking on the red text.
You can also go to entries from the Grammar List, one of the features in the Learning Center for each lesson. Here's the Grammar List for our most recent lesson:
http://www.japanesepod101.com/learningc ... ammar_list
Thanks again for your question, I hope this answer has been helpful.