The geometric movement in sans serifs - sometimes referred to as "grotesques" or "gothics" because of the bias toward roman fonts - is belittled as being mechanistic and uninteresting. They are characterized by a uniform stroke, regular form, and almost circular shapes for the round letters.
Arial is the default sans serif font for the PC. It is a typical geometric sans serif and quite legible in even the smallest sizes on computer monitors
One of the more enduring of the sans serifs, Franklin Gothic was a staple of the printing industry for over a century. It is still widely used as a newspaper headline font.
The corresponding sans serif for use with Century Schoolbook, Century Gothic comes in a variety of weights. Shown here in a medium weight, it would blend well as the subheading for a schoolbook text, which was its primary use.
