You will be able to find English-Spanish dictionaries using the following search terms:
Spanish -- Dictionaries -- English.
English language -- Dictionaries -- Spanish.
By using the facets on the left of the screen you will be able to refine your search including finding specialized dictionaries.
The "Physical Media" facet allows you to select the PRINT results, which are the authorized resources for this course.
ATA-approved Spanish-language resources:
Diccionario de la lengua española
Online dictionary of the Real Academia Española (RAE).