Why not make a booklet for prospective pupils? Depending on the age and ability of children, you can set the task to include illustrations and text. Some points to include are:

• A school survival guide.
• What the important school rules are.
• What the dress code is.
• What the playground rules are.
• What you like best about school.
• Best and worst part of your school year.
• Any advice you would give for next year's pupils.