Maps convey information about the world. Modern technologies have changed how people create maps and the ways they access them. Looking at old maps can show how differently the world was understood in the past.Mapping the sea floor is very difficult, because humans can only stay underwater for short periods of time. While all of the land on Earth has been mapped, parts of the sea floor are still to be explored. Sapphire level titles provide a selection of stories and non-fiction titles chosen for their range of content, narrative and points of view. This level encourages readers to form opinions and discuss their own reading tastes. PM Guided Reading Non-fiction books are fascinating texts that increase in word count and pages in line with progression of children’s reading age, for appropriate literacy skills development. The books represent all the standard text types and contain literal, inferential and applied knowledge questions to test comprehension and promote discussion. #pm19-offer