There are two crossword puzzles:
1 - AR Verbs
2 - Ir, Ser, Hacer, Ver, Dar
This coincides with the preterite verbs taught in Unit 1 Lesson 2 of the Avancemos series, but could be used by any Spanish teacher that wants to help their students practice the preterite tense of the verbs listed above.
I assign these for homework most of the time, but I also find them incredibly useful for when I have a sub that does not speak Spanish, and therefore can't teach new material.