This powerpoint presentation walks children through a step by step approach to successfully reading and writing large numbers. Grouped place value is introduced through the use of 'Street names", and "post boxes" (commas) support children in separating each set of numbers. This a a fail safe method for teaching children to read large numbers. I use it every year and you see their "light bulb" moment every time.
"Number Street" Interactive Posters (FREE resource)