Classroom Icebreaker Riddles

I'm the only place where today comes before yesterday. What am I?

I have branches but no leaves, roots, or bark. What am I?

What gets bigger the more you take away?

I'm full of keys but can't open a single door. What am I?

I'm not alive, yet I grow; I don't have lungs, yet I need air. What am I?

What belongs to you, but other people use it more than you do?

What has to be broken before you can use it?

I travel around the world while staying in the same corner. What am I?

I'm tall when I'm young and short when I'm old. What am I?

I am taken from a mine and shut up in a wooden case, yet I am used by almost every student. What am I?

What can fill a room but takes up no space?

I'm always running yet never move forward. What am I?

I'm light as a feather, yet the strongest person can't hold me for very long. What am I?

What has one eye but can't see?

What do you call a bear with no teeth?

What month of the year has twenty-eight days?

What gets wetter the more it dries?

What can run but never walks, has a mouth but never talks?

What invention lets you look right through a wall?

What is full of holes but still holds water?

I am the name tag stuck on your desk the first day. What am I?

I am the handshake or fist bump meeting a new classmate. What am I?

I am the question 'What did you do this summer?' on day one. What am I?

I am the partner assigned for a think-pair-share. Who am I?

I am the classroom rule posted about respect and listening. What am I?

I am the supply list checked off before school starts. What am I?

I am the locker combination written on a sticky note. What am I?

I am the smile when someone guesses the riddle first. What am I?

I am the teacher learning every name by Friday. Who am I?

I am the feeling when a shy student finally raises a hand. What am I?