Collect leaf specimens and measure their length and width to the nearest millimeter. Write a detailed scientific description of a tree that includes data about its height, circumference and general appearance. Details »
Classroom Resources
Determine if an argument can be supported by the evidence provided, make critical judgements about the validity of statements and practice supporting a theory with evidence. Details »
Determine the validity of predictions about the greenhouse effect, examine how scientists use data about present conditions to extrapolate into the future or the past and identify what variables make it difficult to make precise conclusions. Details »
Explore space-related vocabulary with this interactive glossary. Learn the difference between pulsars and quasars, antimatter and dark matter, brown dwarfs and white dwarfs and many other extraterrestrial wonders. Details »
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Great American Authors
Delve into works by authors Maurice Sendak, Ralph Ellison, Katherine Porter and F. Scott Fitzgerald.
Shakespeare and the Renaissance
Explore the Elizabethan era as it relates to William Shakespeare's plays and sonnets.
