Singapore Math’ Program for American Schools a REPORT of FINDINGS from a RANDOMIZED CONTROL TRIAL
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AN EMPIRICAL EDUCATION REPORT Assessing Impacts of Math in Focus, a ‘Singapore Math’ Program for American Schools A REPORT OF FINDINGS FROM A RANDOMIZED CONTROL TRIAL November 30, 2012 Andrew P. Jaciw Whitney Hegseth Boya Ma Garrett Lai Empirical Education Inc. Acknowledgements We are grateful to the people in Clark County School District for their assistance and cooperation in conducting this research. The research was sponsored by Houghton Mifflin Harcourt which provided Empirical Education Inc. with independence in reporting the results. ABOUT EMPIRICAL EDUCATION INC. Empirical Education Inc. is a Palo Alto, California-based research company that provides rigorous and independent evidence to inform school system decisions. The company brings its expertise in research, data analysis, engineering, and project management to customers that include the US Department of Education, educational publishers, foundations, leading research organizations, and state and local education agencies. ©2012 Empirical Education Inc. Assessing Impacts of Math in Focus, a ‘Singapore Math’ Program for American Schools A Report of Findings from a Randomized Control Trial Reference for this report: Jaciw, A. P., Hegseth, W., Ma, B., & Lai, G. (2012, November). Assessing Impacts of Math in Focus, a ‘Singapore Math” Program for American Schools: Findings from an RCT. (Empirical Education Rep. No. Empirical_MIF121130-FR1-Y1-O.1). Palo Alto, CA: Empirical Education Inc. Table of Contents Introduction ............................................................................................................ 1 Methods ................................................................................................................... 2 EXPERIMENTAL DESIGN ..................................................................................................... 3 How the Sample was Identified ....................................................................................... 4 Randomization .................................................................................................................... 4 What Factors May Moderate the Impact of MIF? .......................................................... 5 What Factors May Mediate Between MIF and the Outcome? ...................................... 5 How Large a Sample Do We Need? ................................................................................. 6 How Small an Impact Do We Need? ............................................................................... 6 How Much Variation is there between Grade-Level Teams? ........................................... 6 How Much Value Do We Gain From a Pretest and other Covariates? ........................... 7 Are There Subgroups of Particular Interest? ................................................................... 8 How Much Confidence Do We Want to Have in our Results? ....................................... 8 Sample Size Calculation for This Experiment ................................................................ 8 SITE DESCRIPTION ................................................................................................................ 9 Table 1. Demographics of Clark County School District ............................................ 9 HOUGHTON MIFFLIN HARCOURT MATH IN FOCUS ................................................. 9 Training/Professional Development ................................................................................ 9 Math in Focus Materials .................................................................................................... 10 Expectations of Implementation ..................................................................................... 11 Control Materials .............................................................................................................. 11 SCHEDULE OF MAJOR MILESTONES ............................................................................. 12 Table 2. Research Milestones .................................................................................... 12 DATA SOURCES AND COLLECTION.............................................................................. 12 Class Rosters and Demographic Data ............................................................................ 13 Achievement Measures .................................................................................................... 13 The Stanford Achievement Test ..................................................................................... 13 The Nevada Criterion-Referenced Test .......................................................................... 14 Testing Schedule............................................................................................................. 14 Program Implementation Measures .............................................................................. 15 Table 3. Implementation Data Collection Schedule for the MIF Study .................... 15 Teacher Background Form.............................................................................................. 15 Teacher Training Observations ...................................................................................... 16 Classroom Observations ................................................................................................. 16 Focus Groups .................................................................................................................. 16 Teacher and Principal Surveys ....................................................................................... 16 Table 4. Survey Participation Rates .......................................................................... 17 Teacher Background ....................................................................................................... 17 Conditions for Math Instruction .................................................................................... 18 Extent of Program Implementation and Implementation Fidelity ................................. 18 Comparison of Classroom Practices between MIF and Control Groups ........................ 18 Teacher Satisfaction with MIF ....................................................................................... 19 FORMATION OF THE EXPERIMENTAL GROUPS ........................................................ 19 Baseline Sample................................................................................................................. 19 Table 5. Characteristics of the Study Sample based on Rosters Received (baseline sample) ...................................................................................................................... 20 Analytical Samples ........................................................................................................... 21 Sample Sizes, Attrition, and Equivalence Tests ............................................................ 21 Table 6. Numbers of Units in the Experimental Groups and Attrition over Time .. 22 SAT 10 Problem Solving ................................................................................................ 22 Table 7. Characteristics of Study Sample (Analytical Sample for SAT 10 Problem Solving) ..................................................................................................................... 23 SAT 10 Procedures ......................................................................................................... 24 Table 8. Characteristics of Study Sample (Analytical Sample for SAT 10 Procedures) ................................................................................................................ 25 CRT ................................................................................................................................ 26 Table 9. Characteristics of Study Sample (Analytical Sample for CRT) .................. 26 REPORTING ON THE IMPACT OF MIF ........................................................................... 27 Setting Up the Statistical Equation ................................................................................. 27 Program Impact .............................................................................................................. 27 Handling Missing Data ................................................................................................. 28 Covariates and Moderators at the Student Level ........................................................... 29 Teacher Level Outcomes and Potential Mediators ......................................................... 29 Fixed and Random Effects .............................................................................................. 30 Exploratory Investigations .............................................................................................. 31 Reporting the Results ....................................................................................................... 31 Effect Sizes ...................................................................................................................... 31 Estimates ........................................................................................................................ 31 p values ........................................................................................................................... 32 Results .................................................................................................................... 32 IMPLEMENTATION RESULTS .........................................................................................