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Learning objects Mobile phone plans: find the best deal 1


Help three customers compare monthly call costs quoted by two different phone companies. Use line graphs to work out the costs for talk time, text messages and total costs. Recommend the best plan. This learning object is one in a series of six objects.

Educational details

Key learning objectives
  • Students construct and interpret line graphs.
  • Students calculate costs from cost-time graphs.
Educational value
  • Requires students to interpret line graphs to compare costs.
  • Provides data tables for students to complete by interpreting textual descriptions of mobile phone call and text message costs.
  • Presents graphs to help students calculate monthly costs for different mobile phone plans.
  • Allows students to compare the cost effectiveness of different mobile phone plans.
  • Supports repeated use by inclusion of randomised quantities and costs.
  • Collates data tables automatically, using student-entered information from the graphs, and offers scaffolded feedback as necessary.
Year level

8; 9

Learning area
  • mathematics
  • Mathematics/Number and algebra
    • Mathematics/Lines
    • Mathematics/Variables
    • Mathematics/Graphs
    • Mathematics/Number relationships
    • Mathematics/Money
    • Mathematics/Data analysis
    • Mathematics/Data interpretation
    • Mathematics/Coordinates
    • Mathematics/Time
    • Analysis;
    • Application;
    • Comprehension;
    • Knowledge
    Student activity
    • Interactives;
    • Experiment;
    • Analysis;
    • Modelling;
    • Data manipulation and interpretation;
    • Estimation
    Learning design
    • Experiential learning;
    • Independent learning;
    • Problem solving;
    • Visual learning

    Other details

    • Technical implementer
    • Script writer
    • Name: Rod Rees
    • Organisation: Rees Films Pty Ltd
    • Address: Blackburn VIC 3130 Australia
    • Subject matter expert
    • Name: Howard Reeves
    • Address: Hobart TAS Australia
    • Publisher
    • Date of contribution: 20 Sep 2013
    • Organisation: Education Services Australia
    • Address: Melbourne VIC 3000 Australia
    • URL:
    Access profile
    • Colour independence
    • Device independence
    • Hearing independence
    Learning resource type
    • Interactive Resource
    • Microsoft Internet Explorer - minimum version: 8.0 (MS-Windows) - maximum version: 9.0 (MS-Windows)
    • Firefox - minimum version: (MS-Windows)
    • Safari - minimum version: 5.1 (MacOS)
    Operating systems
    • MacOS - minimum version: 10.6
    • MS-Windows - minimum version: XP - maximum version: 7
    • © Education Services Australia Ltd, 2013, except where indicated under Acknowledgements.