I have published a page on graphs for year 3 children today; thanks to urbrainy for this resource. The main difference with data handling from year 2 to year 3 is that the reading divisions becomes harder as they may no longer go up in ones. Hence children are having to find numbers half way between two others.
This graph looks at interpreting the data of a graph showing the most popular zoo animals. The second page shows a blank tally chart so that children can collect their own data and then create their own graph.