Conventional: - Members are payed to play in the orchestra. - Orchestras usually contain only string instruments, but there are Symphony Orchestras where there are a large variety of instruments. (Brass, Woodwind, String, and Percussion.) - Not usually taught in schools.
Concert: - Taught in schools. - Members do not get payed to play, but pay to play. - Concert band does not contain string instruments.
Marching Band: -Taught in schools. - Members are not usually paid. - Only contains brass, woodwind, and percussion instruments.