Math Poster ideas?

I need to make a poster in mathematics — It has been related to mathematics — What kind of things should I put it?

You could put different types of charts: histograms, line graphs, etc. and you can save different geometric shapes. I'd do something kind of collage and other things cut out of magazines that have numbers above. You might set calculators or paper chart or a line number or a reporter or a real tool or device you can use in math class.

Shaping the Way We Teach English: Module 08, Authentic Materials