Meets WWC Group Design Standards With Reservations
Gallagher,
Woodworth,
and
Arshan
(2015)
Randomized
controlled
trial that
needs to
demonstrate
equivalence
2,486 7th- to
9th-grade
students
44 rural
high-poverty
districts
across 10
U.S. states
Teachers received professional
development through the National
Writing Program’s College-Ready
Writers Program to support collab-
orative teaching. They delivered
instruction on argument writing in
4- to 6-day units, using materials
provided by the College-Ready Writers
Program, and they used regular
formative assessments to analyze
student skills and needs.
Teachers taught their
regular lessons.
audience =
0.16*
organi-
zation =
0.20*
use of
evidence =
0.20*
Olson
and Land
(2008)
c
Quasi-
experimental
design
478 9th- to
12th-grade
students
(majority
mainstreamed
English
learners)
Schools in
2 school
districts in
Los Angeles
County,
California
Teachers received professional
development through the Pathway
Project on reading and writing strat-
egy instruction. They modeled the
strategies in class and gave students
time to practice and reflect on their
use of writing strategies. They used
an on-demand writing assessment
to gauge student needs and prog-
ress. The intervention was imple-
mented over 2 school years, with
effects measured after 1 year and
after 2 years.
Teachers taught their
regular lessons.
overall
writing
quality =
0.71*
d
Olson
et al.
(2016)
e
Randomized
controlled
trial that
needs to
demonstrate
equivalence
1,817 7th- to
12th-grade
students
16 secondary
schools in
Anaheim
Union School
District,
California
Teachers received professional
development through the Pathway
Project on reading and writing strat-
egy instruction. They modeled the
strategies in class and gave students
time to practice and reflect on their
use of writing strategies. They used
an on-demand writing assessment to
gauge student needs and progress.
The intervention was implemented
over 1 school year.
Teachers taught their
regular lessons.
overall
writing
quality =
0.46*
f
Notes: All studies in this table meet WWC group design standards with or without reservations. Within each rating section, studies are
listed alphabetically by first author.
Each row in this table represents a study, defined by the WWC as an examination of the effect of an intervention on a distinct sample.
In some cases, multiple contrasts or studies were described in a single article. In these cases, the contrast or study that is most relevant
to the recommendation is included in the table.
For studies that included multiple outcomes in a domain, reported effect sizes and statistical significance are for the domain and calcu-
lated as described in the WWC Procedures and Standards Handbook 3.0 (pp. 28–29).
(continued)
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