Below is a link to an excellent online resource, which I recommend you use for any primary source reading you will be doing for this module. It is comprehensive and also has full transliterations (according to the YIVO system) of all entries. You can also search either in Hebrew or Latin letters. Excellent interface and clear results fiche:
The most comprehensive Yiddish-English-Yiddish dictionary in print is Uriel Weinreich’s, 1968 repr. 1977, published by Schocken Books. Click here to find a copy.