Some projects involve math and science (e.g., a noon observation project, in which students at sites across the country measure the shadow cast by the sun at noon and then use the data to estimate the earth's circumference).
(Some projects; involve; math and science (e.g.) (students at sites across the country; measure; the shadow cast by the sun at noon; L:a noon observation project) (the shadow; cast; by the sun; T:at noon) (students at sites across the country; use; the data; to estimate the earth's circumference; T:then)
Some projects students at sites across the country the shadow students at sites across the country
involve measure cast use
math and science (e.g.
the shadow cast by the sun at noon L:a noon observation project
by the sun T:at noon
the data to estimate the earth's circumference T:then