Listen to the lecture on Imperial Ambitions and Sectional Crises from 1842-1861 and submit your lecture notes by Friday, November 20 at midnight.
Also, read Chapter 13 – Antebellum Idealism and Reform Impulses, 1820“1860 and Chapter 14 – Troubled Times: the Tumultuous 1850s 
This a low-stakes assignment to help you prepare for the final exam
https://openstax.org/books/us-history/pages/14-introduction