The National Academy of Sciences has just published a stunning set of posters that showcase twenty-first century mathematics and its applications in the real world. These are freely available and would be perfect for classroom displays.
They cover topics including: the mathematics of internet security; concrete impacts of abstract geometry; the mathematics and statistics behind weather forecasting; the mathematics of getting from A to B; the mathematics that powers AI; how mathematics is used to enable personalised precision medicine; the mathematics of imaging; and leveraging manufacturing with mathematics.