Students read about the discovery of Pluto in 1930, as they solve math problems.
*On Aug. 24, 2006, Pluto got "demoted" to dwarf planet status. Read more about Pluto's new status at our sister site, Fact Monster.
*On Aug. 24, 2006, Pluto got "demoted" to dwarf planet status. Read more about Pluto's new status at our sister site, Fact Monster.
Excerpted from