## Saturday 17 January 2015

### Math new chapter: Data Management

Dear Parent,
During the next week, your child will design surveys to collect data; sort and
organize data using Venn diagrams and tally charts; represent data by creating
pictographs and bar graphs with scales of 2, 5, and 10; and describe and interpret
bar graphs, pictographs, and circle graphs. Your child will explore what makes a
survey question a good one, how best to organize and display a given data set,
and what sorts of things a graph can tell us.
Throughout this time, you and your child can practise some activities such as the
following:
• Your child can count some items that come in large quantities (e.g., straws) and
create a pictograph with a scale of 10 to represent the items.
• Your child can design a question, conduct a survey, tally the results, and display
the data in a bar graph. For example, they could ask, “How many of my books
do I want to read, or read again: soon, someday, or never?” and then interpret
the results.
• Your child could look in the media for examples of bar graphs with scales and tell
you 3 or 4 things the graph shows. The scale might be larger than 10; they could
discuss why the scale used is appropriate.
• When sharing a circular item, such as a pie, encourage your child to compare the
sizes of slices (cut from the centre); this is similar to a circle graph.
You may also want to visit the Nelson Web Site at www.mathk8.nelson.com for