Some schools in Detroit are installing more analog clocks -- rather than digital clocks -- to help teach students to tell time the old-fashioned way. Such concepts, educators say, are important to help students learn to understand time and also develop math skills. "In first grade, we have connected number lines to the numbers around an analog clock," said first-grade teacher Amy Palmer. "Skip counting by 5s around the outside of the clock. They also help students with fractions" by counting half- and quarter-hours.