There is a wealth of preproduced stock music of every kind on compact disc, designed specifically for media production, at very reasonable rates. The difference between the quality of production music and the output of a major record label is virtually nonexistent. Library compositions are designed for media use and blend well with narration. The music is less expensive than original or licensed pop music. It's relatively easy to get clearance from one source.
Library music is available for immediate use.
Your audience today, whether in the classroom or across a satellite network, is sophisticated about media. The viewer will accept a diversity of styles and moods that work with the message. This cultural mingling is present everywhere, from motion pictures to local advertising. General acceptance of this mixture allows a lot of liberty in this global village and provides a broad palette of choices as we move from project to project or from scene to scene within a project. The obvious consideration is tempo and rhythm.