Testing procedure
Fifth-grade students in the intervention and
comparison classrooms were tested in the fall and the
spring of the academic year on a series of tests designed
to reflect the skills the curriculum taught
(forming deeper representations of word knowledge,
understanding polysemy, morphological analysis, inferring
word meaning from context) as well as reading
comprehension. Bilingual graduate research
assistants administered all tests (see the Measures section).
Because of various scheduling difficulties, not
all students took all tests.