Welcome to Parsimony’s blog, where we help K-12 educators identify evidence based ways to maximize student outcomes.

This blog post is part of our What Works Clearinghouse review series. The What Works Clearinghouse (WWC) is an initiative by the Institute of Education Sciences (IES) which is the independent statistics, research, and evaluation arm of the United States Department of Education. WWC estimates the effectiveness of programs by evaluating the quality and quantity of evidence for that program.

This week’s blog post is about the evidence behind Too Good for Drugs and Violence’s (TGFD & V) impact on students. Here’s the short version:

TGFD & V is a is designed to promote high school students’ pro-social skills, positive character traits, and violence- and drug-free norms. The curriculum consists of 14 core lessons, as well as an additional 12 lessons that can be infused into other subject areas (such as English, science, and social studies). Teachers participate in 10 staff development lessons.

The evidence for TGFD & V covers students in 9th grade through

12th grade.

The outcomes examined include: knowledge, attitude and values. Here’s what the evidence suggests about TGFD & V’s impact on each outcome:

  • Knowledge, attitude and values: Positive impact (an average student would be expected to improve by 16 percentile points)

The studies looking into TGFD & V had student samples that were in areas in Florida and had students who were White, Black, and Hispanic.

You can find the full report from the What Works Clearinghouse here:


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