This 29 slide powerpoint can be used to practice conjugating Spanish verbs in the preterite and imperfect. Each slide contains a sentence in Spanish: the verb is missing and listed at the end of the sentence in the infinitive form and the preterite or imperfect trigger word is bolded. Upon clicking, first either "preterite" or "imperfect" appears at the top of the slide; the correctly conjugated verb appears after a second click. In addition, the corresponding letter to the acronyms BOLTS and UBOAT (used for uses of the preterite and imperfect) appear on the upper righthand corner of the slide. Of course, you can change out the letters with the acronym you use in your class.
Any feedback would be greatly appreciated. Muchas gracias :)