Here are the odd ones out for each list:

1. **B. teamwork** - The others (website, media, forum) are all related to internet or online platforms, whereas teamwork is more about collaboration.

2. **B. bully** - The others (craft, browse, upload) are actions or activities, while bully refers to a negative behavior or type of person.

3. **D. mature** - The others (connect, post, log on) are actions related to internet use, while mature is an adjective describing a level of development.

4. **C. discuss** - The others (suit, enjoyable, user-friendly) are adjectives describing qualities, whereas discuss is a verb meaning to talk about something.

5. **A. session** - The others (practical, schoolwork, peer) are related to education or schooling, while session does not specifically relate to this context as it can refer to a period of activity or a meeting in any context.