In this fourth unit of an introductory Spanish course that focuses on Ecuador, students learn about different types of verbs in Spanish, time, the difference between al and a la, interrogatives, how to develop a schedule of events,...

This site has a detailed step-by-step instruction of how to convert units of measurement. Multiplying by 1 is explained as are compound units, and finding conversion factors. The discussion is slowed down for students who may have missed...