Undergraduate students can publish in peer reviewed journals!

Here are a few examples of journals that are meant specifically for undergraduate student submissions:

Council of Undergraduate Research (CUR) 

American Journal of Undergraduate Research (AJUR) 

Undergraduate Research and Creative Activities 

Here are three more complete lists of journals targeting undergraduate student submissions:

https://www.cur.org/resources/students/undergraduate_journals/

https://www.carthage.edu/undergraduate-research/journals/

http://www2.umf.maine.edu/honors/resources-for-publishing-undergraduate-research/

https://unl.libguides.com/c.php?g=51642&p=333920