People have always needed ways to measure the passing of time. Some of the earliest clocks used sand or candles to measure time. By performing experiments with sand and candles, it is still possible to create simple clocks today. Many cities have big clocks in public places. Some of these clocks have become so famous that people go to see them when they are visiting the city. Ruby level titles give readers the variety they need to become confident and successful readers, using a range of characters, topics and text styles keep children engaged and encourage discussion. 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