Stem-and-leaf graphs: an introduction (Years 7-9). This is a tutorial to help students understand the features of stem-and-leaf graphs and back-to-back stem-and-leaf graphs. They see how the graphs are used to display data and observe how the mean and median of the data sets can be used to interpret information.
Graph investigator: getting to school - Mathematics (9). How long do most students take to get to school? Select appropriate data sets and choose a useful graph type to help you investigate this question. See the data presented in the graph type you chose and draw a conclusion about this question. Explore different graph types such as pie graphs, stem-and-leaf graphs and scatter plots. There's a glossary of difficult terms.
Data: years 7 to 9 – collection. The 12 learning objects in this collection relate to the use, collection, display, comparison and interpretation of data. Objects in the first category, statistical data graphs, enable students to explore data using a range of graphical analysis tools. Objects in the second category, analysing surveys, enable students to identify and correct misleading representations of data, and model the process of conducting a survey.
C2C Mathematics Year 7 Unit 7. Link for Independent and Catholic school teachers. Students develop understandings in data representation and interpretation, where they construct stem-and-leaf plots and dot-plots, calculate mean, median, mode and range, compare a range of data displays, describe and interpret data displays using mean, median and range and identify and investigate issues involving numerical data collected from primary and secondary sources.
Take a chance - unit of work (Years 7-9). This unit provides students with a real-life context to investigate the language of chance and how events may be manipulated to alter the chance of something happening. It also introduces the use of fractions, decimals and percentages when looking at probability.