The image shows a poster hanging on a door in a classroom. The poster has a red background with white text that reads "Apuntate al Wikihachatón y Applica tus conocimientos" which translates to "Join the Wikihatchathon" in English. Below the text, there is an illustration of a hand holding a microphone and the date "18-19 October 2018" in Spanish. 

In the background, there are students sitting at desks with laptops and other computer equipment. The room appears to be well-lit with natural light coming in from the windows. The students are wearing casual clothes and appear to be engaged in their work.