One possible first day of school activity for grade 6 students could be an icebreaker game called “Two Truths and a Lie.” Here’s how it works:

1. Have each student think of two true statements about themselves and one false statement.
2. Ask each student to write down their three statements on a piece of paper.
3. Once everyone is ready, have each student take turns sharing their statements with the class.
4. After each student shares their statements, the rest of the class can guess which statement is the lie.
5. The student can then reveal the lie and share some additional information about the true statements.

This activity helps students get to know each other better and encourages communication and interaction within the classroom. It also creates a fun and engaging atmosphere on the first day of school.