# Effects of Good Teachers on Student Outcomes

These findings would suggest that the difference in achievement gains between having a 25th percentile teacher (a not so effective teacher) and a 75th percentile teacher (an effective teacher) is over one-third of a standard deviation (0.35) in reading and almost half a standard deviation (0.48) in mathematics. Similarly, the difference in achievement gains between having a 50th percentile teacher (an average teacher) and a 90th percentile teacher (a very effective teacher) is about one-third of a standard deviation (0.33) in reading and somewhat smaller than half a standard deviation (0.46) in mathematics. . . . These effects are certainly large enough effects to have policy significance. (p. 253)

## Notes:

**Folksonomies:** science education teaching student outcomes

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/law, govt and politics/politics/foreign policy (0.467084)

/science/mathematics (0.402590)

/law, govt and politics/politics/domestic policy (0.337500)

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**Concepts:**

Percentile (0.975860): dbpedia | freebase

Arithmetic mean (0.885570): dbpedia | freebase

Standard deviation (0.865323): dbpedia | freebase

Median (0.844709): dbpedia | freebase

Mean (0.824075): dbpedia | freebase

Statistics (0.823873): dbpedia | freebase | opencyc

Normal distribution (0.783175): dbpedia | freebase

Deviation (0.666890): dbpedia | freebase

Percentile rank (0.659929): dbpedia | freebase

Skewness (0.654562): dbpedia | freebase

Cauchy distribution (0.619200): dbpedia | freebase | yago

**How Large Are Teacher Effects?**

**Periodicals>**

**Journal Article:**Nye, Konstantopoulos, Hedges (Fall 2004)

*, How Large Are Teacher Effects?*, Educational Evaluation and Policy Analysis, Fall 2004, Vol. 26, No. 3, pp. 237-257, Retrieved on 2016-09-02

**Folksonomies:**education teaching