July 2007 Volume 10 Number 3 - Educational Technology & Society

Figures 2-5 display screenshots of the DVREMS of different viewpoints. In Figure 2, students view the Earth from
the North Pole to observe the midnight sun. In the whole view (Figure 3), students observe the Earth orbiting the Sun
to understand heliocentricity. Figure 4 depicts the side view of the Earth, and students explore the half-shaded and
half-lit Earth to understand the distinction between day and night. Viewing from the Earth (Figure 5) teaches the
causes of star movement, sunrise and sunset.
Figure 3. The whole view
Figure 4. Half-shaded and half-lit Earth
Figure 5. View form the Earth
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