Back to school idea - "We're looking back on summer, this is what we see!" Have students draw pictures of things they have done over summer break in sunglasses. You could also do it for things students are looking forward to this year.
Games for the classroom: FREE Read and retell game. Love this idea to pass the dice around the room and have 6 students roll and retell. or I could roll as the teacher and choose students to retell. This would also work great for small reading groups.
'Be' Bulletin Board Ideas. Talk to your students about the qualities it takes to be a successful student. This is a great way to encourage the character traits you wish to see in your students and It is a perfect idea for your classroom door decoration.