Sound System for Classroom

Hi, I teach in Thailand and want to upgrade the sound system in the classroom. It's 34'x20'x8', cement walls and windows along two walls. I'd like recommendations for a 6-8 channel system, powered or passive mixer with powered speakers. I show Youtube videos and use two Bluetooth microphones. I want to completely replace all components. Any recommendations please?


classroom-1.jpg
classroom-2.jpg