A local school district would like to implement a reading intervention to help students who are struggling with their reading skills. The school gives all of their 2nd grade students a reading test. They split the students into a high-performing and low-performing group based on the scores. The high-performing group is taught via the traditional method. The low-performing group is taught with the special intervention method. The two groups are re-tested after eight weeks. The school found that the low-performing group improved drastically, while the high-performing group did worse. The school district concludes the intervention works. Based on the story above, address the following: Does the school district have definitive evidence that the reading intervention works? How might the results be related to the concept of regression towards the mean? What suggestions would you make to the school district if they wanted to mitigate the regression towards the mean effect?

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