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Impacts of an Enhanced Family Health and Sexuality Module of the HealthTeacher Middle School Curriculum
Last registered on June 22, 2015


Trial Information
General Information
Impacts of an Enhanced Family Health and Sexuality Module of the HealthTeacher Middle School Curriculum
Initial registration date
June 22, 2015
Last updated
June 22, 2015 4:31 PM EDT
Primary Investigator
Mathematica Policy Research
Other Primary Investigator(s)
Additional Trial Information
Start date
End date
Secondary IDs
The trial examines the impacts of a HealthTeacher, a popular online K-12 health education program used by hundreds of school districts around the United States. The trial focuses specifically on an enhanced version of HealthTeacher's main sex education module for middle school students. The trial involves a sample of 7th grade students from 17 Chicago public middle schools. Among participating schools, about half were randomly assigned to a treatment group that provided HealthTeacher to 7th grade students during winter and spring of the 2010-2011 school year. The other half were assigned to a control group that did not provide the program. Follow-up data were collected over an 18-month period, through spring of 2012 when the students were in 8th grade. This study of HealthTeacher is part of the broader Evaluation of Adolescent Pregnancy Prevention Approaches (PPA) study, a major federal effort to expand available evidence on effective ways to prevent and reduce pregnancy and related sexual risk behaviors among teens in the United States.
Registration Citation
Goesling, Brian. 2015. "Impacts of an Enhanced Family Health and Sexuality Module of the HealthTeacher Middle School Curriculum." AEA RCT Registry. June 22. https://doi.org/10.1257/rct.742-1.0.
Former Citation
Goesling, Brian. 2015. "Impacts of an Enhanced Family Health and Sexuality Module of the HealthTeacher Middle School Curriculum." AEA RCT Registry. June 22. http://www.socialscienceregistry.org/trials/742/history/4556.
Experimental Details
Students in the intervention schools received one specific component of HealthTeacher, the Family Health and Sexuality module of the middle school curriculum. This component of the curriculum consists of nine lessons, each 45 to 90 minutes long, covering topics such as respectful behavior, adolescence, female and male reproductive anatomy, menstruation and sperm production, goal setting, abstinence, refusal skills, and sexually transmitted disease (STD)/HIV prevention. To meet state and local guidelines for 7th grade sex education in Chicago, schools also enhanced the standard nine-lesson curriculum with three additional lessons: one on contraceptive methods and two on the issues of sexual orientation and gender identity.
Intervention Start Date
Intervention End Date
Primary Outcomes
Primary Outcomes (end points)
The study measured three groups of outcomes: (1) student exposure to information on reproductive health, contraceptive methods, and STD transmission and prevention; (2) measures of potential mediating factors such as knowledge, refusal skills, attitudes, and intentions; and (3) measures of youth sexual risk behaviors. All outcomes were measured at two time points: (1) an interim follow-up survey conducted about 6 months after the intervention and (2) a final follow-up survey conducted about 12 months after the intervention.
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
The trial used a cluster random assignment design. About half the schools were randomly assigned to the treatment group and half to the control group. To help improve the precision of the study’s impact estimates and to reduce the possibility of a chance imbalance between the treatment and control groups, we grouped the schools into matched pairs prior to random assignment. The matching was based on school size, the racial/ethnic composition of the student body, and the proportion of students receiving free or reduced-price lunch.
Experimental Design Details
Randomization Method
We used a random number generator in the SAS statistical software program to randomly assign one school to the treatment group and one to the control group
Randomization Unit
Random assignment was conducted at the school level.
Was the treatment clustered?
Experiment Characteristics
Sample size: planned number of clusters
17 schools
Sample size: planned number of observations
1,534 seventh grade students
Sample size (or number of clusters) by treatment arms
9 schools treatment, 8 schools control
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB Name
Public/Private Ventures Institutional Review Board
IRB Approval Date
IRB Approval Number
Post Trial Information
Study Withdrawal
Is the intervention completed?
Is data collection complete?
Data Publication
Data Publication
Is public data available?
Program Files
Program Files
Reports, Papers & Other Materials
Relevant Paper(s)