Here are the odd ones out for each group:

1. **D. Judo** - The others (Compass, Textbook, Calculator) are educational tools, whereas Judo is a sport.

2. **B. Play** - The others (English, Science, History) are subjects taught in school, while "play" is an activity.

3. **C. With** - The others (Have, Share, Study) are verbs that indicate actions, while "with" is a preposition.

4. **A. Classmate** - The others (Remember, Knock, Help) are verbs, while "Classmate" is a noun.

5. **B. Post office** - The others (Uniform, Library, Classroom) are related to school or educational settings, while "Post office" is a place for mailing letters and packages.