1. Arts participation

    Low impact for low cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +2
  2. Aspiration interventions

    Very low or no impact for moderate cost, based on very limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    0
  3. Behaviour interventions

    Moderate impact for moderate cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +3
  4. Block scheduling

    Very low or no impact for very low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    0
  5. Built environment

    Very low or no impact for low cost, based on very limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    0
  6. Collaborative learning

    Moderate impact for very low cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  7. Digital technology

    Moderate impact for moderate cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +4
  8. Early years interventions

    Moderate impact for very high cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  9. Extending school time

    Low impact for moderate cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +2
  10. Feedback

    High impact for very low cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +8
  11. Homework (Primary)

    Low impact for very low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +2
  12. Homework (Secondary)

    Moderate impact for very low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  13. Individualised instruction

    Moderate impact for very low cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +3
  14. Learning styles

    Low impact for very low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +2
  15. Mastery learning

    Moderate impact for very low cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  16. Mentoring

    Very low or no impact for moderate cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    0
  17. Metacognition and self-regulation

    High impact for very low cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +7
  18. One to one tuition

    Moderate impact for high cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  19. Oral language interventions

    Moderate impact for very low cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  20. Outdoor adventure learning

    Moderate impact for moderate cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +4
  21. Parental engagement

    Moderate impact for moderate cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +3
  22. Peer tutoring

    Moderate impact for very low cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +5
  23. Performance pay

    Low impact for low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +1
  24. Phonics

    Moderate impact for very low cost, based on very extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +4
  25. Reading comprehension strategies

    High impact for very low cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +6
  26. Reducing class size

    Moderate impact for high cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    +3
  27. Repeating a year

    Negative impact for very high cost, based on moderate evidence.

    Cost
    Evidence Strength
    Impact (months)
    -4
  28. School uniform

    Very low or no impact for very low cost, based on very limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    0
  29. Setting or streaming

    Negative impact for very low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    -1
  30. Small group tuition

    Moderate impact for moderate cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +4
  31. Social and emotional learning

    Moderate impact for moderate cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +4
  32. Sports participation

    Low impact for moderate cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +2
  33. Summer schools

    Low impact for moderate cost, based on extensive evidence.

    Cost
    Evidence Strength
    Impact (months)
    +2
  34. Teaching assistants

    Low impact for high cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +1
  35. Within-class attainment grouping

    Moderate impact for very low cost, based on limited evidence.

    Cost
    Evidence Strength
    Impact (months)
    +3