Which of the following is NOT one of the four main categories of Praxis tests?

The category that is not one of the four main categories of Praxis tests is "Principles of Effective Teaching." The Praxis tests are primarily designed to evaluate the knowledge and skills necessary for effective teaching. The four main categories of Praxis tests include:

1. Core Academic Skills for Educators, which assesses basic skills in reading, writing, and mathematics necessary for teaching.

2. Subject Assessments, designed to evaluate the understanding of specific subjects that a teacher will teach.

3. Specialty Area Tests, which assess more specialized content knowledge for specific endorsements or license areas.

"Principles of Effective Teaching" does not fall under these main categories used to gauge teaching competencies, making it the correct response in this context. The other options represent valid categories that contribute to assessing the readiness of educators in various professional domains.