While grammar exercises are never the be-all end-all of the Native Spanish Speaker classroom, they are a super important part of ensuring our native Spanish speaking learners have a strong command of written language in order to be successful bilinguals in an educated setting. I often found straight-up memorization of very conjugations to get a bit boring, until I stumbled upon the fluency exercise called the Mad Minute. While often used in Math classrooms, the Mad Minute is easily adaptable for high school Spanish grammar students. The idea behind the Mad Minute Fluency Drills is to create a sheet of lots of rote grammar exercises (some part of content that needs to be memorized and executed in the classroom at a high level in order to be successful in the course), that students must attempt to complete within one minute. There should be more exercises on the page than a student could reasonably complete in one minute, but not so many that a student looks at the paper and immediately wants to give up. This Mad Minute is for Present Tense Subjunctive and Indicative, and additional tips on how to use it can be found here: http://www.puravidamoms.com/bilingualwe/teaching/fluency-exercises-in-the-native-spanish-speaker-classroom/
Note: This bundle includes a worksheet and answer keys for 5 personal pronouns: yo, tu, el/ella/usted, nosotros and ustedes.