Level 1 Criteria
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C Class-level RCT
- Randomization was conducted at the teacher/classroom level (whole focal classes assigned to treatment or control), which satisfies the class-level RCT requirement.
- "Teachers were randomized together with the students in a single focal class, within school-by-grade blocks to provide better equivalence across baseline indicators of key outcomes and of contextual factors." (p. 21)
- Relevant Quotes: 1) "Two hundred and thirty teachers from partner districts affiliated with the NWP sites were stratified by school and grade and then randomly assigned to the treatment or control group." (Abstract, p. 1) 2) "Teachers were randomized together with the students in a single focal class, within school-by-grade blocks to provide better equivalence across baseline indicators of key outcomes and of contextual factors." (p. 21) 3) "SRI then randomized approximately half of the recruited teachers (and their classrooms) into treatment and half into control (delayed treatment)." (p. 21) 4) "Randomization occurred within grade-level blocks consisting of school-by-grade groupings, although not all schools had multiple study teachers in the same grade." (pp. 21-22) Detailed Analysis: The unit of randomization was the teacher together with an entire intact focal class of students, not individual students within a classroom. Each teacher was randomized with his or her whole focal class into either the treatment or the control (delayed treatment) condition within school-by-grade blocks. This is precisely the class-level cluster randomization that criterion C requires: whole classes were allocated to conditions, which prevents within-class contamination between treatment and control students. The randomization process is clearly described (performed by the independent evaluator SRI, with blocking by school and grade, 113 treatment and 117 control teachers), so the process is transparent and properly implemented. All quotes were checked against the source PDF and are verbatim. Criterion C is met because entire teachers/classes, not individual students within a class, were randomly assigned to conditions.
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E Exam-based Assessment
- The study used a recognized state standardized exam (SBAC ELA) as an outcome measure alongside the study-created writing assessment, satisfying the exam-based assessment requirement.
- "Finally, SRI ran impacts on California's standardized ELA assessment, SBAC." (p. 42)
- Relevant Quotes: 1) "SRI examined two types of student learning outcomes: one was writing data from study created prompts and the other were standardized assessments." (p. 38) 2) "The student writing was scored with the Analytic Writing Continuum for Literary Analysis (AWC-LA). Over a decade, the NWP developed the Analytic Writing Continuum (AWC), which has been shown to be a valid and reliable measure of student writing (Bang, 2013)." (p. 39) 3) "As an additional measure of student achievement, SRI collected state ELA assessment data as available. California began administering the Smarter Balanced Assessment Consortium (SBAC) assessment in spring 2014 to students in grades 3-8 and 11. These data served as an additional outcome measure for students." (p. 41) 4) "Finally, SRI ran impacts on California's standardized ELA assessment, SBAC." (p. 42) 5) "SRI found no evidence of a transfer of the intervention's impact on writing to a broader measure of student ELA achievement (d=.06, s.e.=.05, p>.10...)." (p. 46) Detailed Analysis: The primary outcome was an on-demand writing assessment built from study-created prompts, scored on the NWP AWC-LA rubric; this instrument, although scored with a validated rubric by blinded external scorers, was designed for the study and is not by itself a widely recognized standardized exam. However, the study also formally measured and reported outcomes on the Smarter Balanced Assessment Consortium (SBAC) test, California's official state standardized ELA assessment, using the prior-year California Standards Test as the baseline. The ERCT standard explicitly states that what matters is that a standard exam-based assessment is used, not whether a positive effect is found on it; the null SBAC result (d=.06, n.s.) therefore does not affect this criterion. A recognized state standardized exam was used as an outcome measure and its results were transparently reported. All quotes were checked against the source PDF and are verbatim. Criterion E is met because the study used California's SBAC state standardized ELA assessment as an outcome measure (in addition to the study-created writing assessment), and reported its results regardless of the null finding.
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T Term Duration
- Outcomes were measured in spring, roughly seven to eight months after the fall start of the year-long intervention, exceeding the one-term requirement.
- "SRI administered a 2-day writing assessment to all students in focal classrooms in the fall as a baseline measure and again in spring as an outcome." (p. 38)
- Relevant Quotes: 1) "The treatment is an intensive 46-hour PD program (via six full-day released days interspersed throughout the school year and five 2-hour after-school sessions)..." (p. 11) 2) "SRI administered a 2-day writing assessment to all students in focal classrooms in the fall as a baseline measure and again in spring as an outcome." (p. 38) 3) "Teachers administered the baseline prompt before learning of their randomization status and before the first PD session." (p. 39) 4) "In late April or early May, teachers administered the posttest." (p. 30) Detailed Analysis: The intervention began in the fall of the school year (the baseline writing assessment was administered in the fall, before the first PD session) and the outcome measurement (posttest) was administered in late April or early May, i.e., in spring of the same school year. The interval from intervention start to outcome measurement therefore spans roughly seven to eight months, covering the school year from fall to spring. This far exceeds the one-term (approximately 3-4 months) minimum tracking interval that criterion T requires. All quotes were checked against the source PDF and are verbatim. Criterion T is met because outcomes were measured about seven to eight months after the intervention began, well over one full academic term.
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D Documented Control Group
- The control group's size, demographics, baseline equivalence, attrition, and business-as-usual treatment are documented in detail.
- "Control teachers were asked to maintain business-as-usual conditions and were offered a 1-year version of the program at the end of the study." (p. 21)
- Relevant Quotes: 1) "The teacher sample consisted of 230 secondary ELA and ELD teachers across grades 7-12, from 40 schools; 113 teachers were assigned to treatment and 117 to control." (p. 20) 2) "Students in both treatment and control conditions were roughly equivalent across most demographic characteristics (e.g., English learner status and race/ethnicity). (See Table A in the online supplementary materials)." (p. 20) 3) "Control teachers were asked to maintain business-as- usual conditions and were offered a 1-year version of the program at the end of the study." (p. 21) 4) "Control teachers conducted business as usual using the district English language arts textbook and core novels for teaching." (p. 31) 5) "This model predicted standardized baseline differences on the holistic AWC-LA of -.02 (p>.1), meeting the What Works Clearinghouse standards for baseline equivalence (IES, 2017)." (p. 41) 6) "The study's student attrition was 27% overall, 26% for treatment students, and 29% for control students." (p. 21) Detailed Analysis: The control group is well documented. The paper reports the number of control teachers (117) and their schools, demographic equivalence of control and treatment students (with a detailed supplementary table on English learner status and race/ethnicity), formally established baseline equivalence on the outcome measure (-.02 SD, meeting WWC standards), attrition rates by condition, and a clear description of what the control condition received (business-as-usual instruction with the district ELA textbook, plus the same half-day Collections textbook PD as treatment teachers, with the intervention offered only after the study). This documentation permits proper comparison and interpretation of results. All quotes were checked against the source PDF and are verbatim. Criterion D is met because the control group's size, demographics, baseline performance, and business-as-usual condition are clearly documented.