Final answer:
The redefinition of school shootings as terrorism has not made a significant impact on reducing shootings.
Step-by-step explanation:
The statement that the redefinition of school shootings as terrorism has made a significant impact on reducing shootings is false. According to Altheide, there is no evidence to suggest that classifying school shootings as terrorism has led to a decrease in the occurrence of such incidents. In fact, the cases of school shootings have continued to rise, and the motives behind them vary, including issues related to mental health, access to firearms, and social factors.