Program Type Evidence of effectiveness Effects%1%
Jamaica curriculum
Yes
32.00
    Healthy Families America
    Yes
    24.00
      Infant Health and Development Program
      Yes
      22.00
        Early Head Start
        Yes
        12.00
          Nurse Family Partnership
          No
          37.00
            Home Instruction Program for Preschool Youngsters
            No
            21.00
              Parents as Teachers
              No
              6.00

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                Including those without statistically significant effects

                1 Effects are expressed in learning points. Tests are standardized so that they have a standard deviation of 100. To benchmark effects, a third grader improves her scores in 40 learning points in one year.
                = 1-5 LP , = 6-10 LP, = 11-15 LP, = 16-20 LP, = 20+LP.
                = No effect or negative effect