Teacher Practical Guidance:

Age w/in Class

Category: External

Rank Order

48

Effect Size

0.45

Achievement Gain %

17

How-To Strategies

How-To Resources

References

Age within Class

DEFINITION

DATA

  • 1 meta-analysis review

  • 8 research studies

  • 3 million + students in research studies

Hattie (2023) p. 185

QUOTES