Final answer:
The name of the annual fundraiser at Posada Middle School is not provided in the available information, and further details would be necessary to answer this question accurately.
Step-by-step explanation:
The annual fundraiser at Posada Middle School is not specified in the given information. To provide an accurate answer regarding the specific name or details of Posada Middle School's annual fundraiser, additional information would be required. However, as the trained individual is conducting art appreciation presentations in school classrooms on a monthly basis, it's possible that the fundraiser could involve an art-related event or activity, but this is speculative without concrete details.