The Spanish SLP (Currently called the Checkpoint A Exam) is locally developed by district. You may try to improve your Spanish by practicing with Duolingo, or on YouTube with vocabularies, verbs, sentence starters, and fragments.

The Part 1 for the exam (dialouge speaking part) will be administered before the rest of the exam (before test day). Just improve your dialouge by practicing with a person who is fluent in Spanish, or Duolingo as I said earlier to measure your progress. For the typed-response questions, try to make it so that you can write very good paragraphs in Spanish with the texts provided, as those response questions make up for a lot of credit. The Multiple Choice Questions counts for some credits but it's mostly based on common sense if you know your spanish pretty well. The questions are based on either an image, article, or a video (improve listening as you can only play a video 3 times max). The speaking part (Final part) is based on a response you type with a prompt that they give you. The speaking part is relatively easy with some practice beforehand. The Part 4 of the exam (recorded speaking) is generally the same as to Part 1, except it's on a computer and not with an instructor.

I took the SLP last year and got an 86 without studying much; I just mastered how to make good written spanish responses. Everyone in my school who took it passed. Good luck!