Key concepts:Draw histograms and boxplots using technology Apps: Statistics
This activity uses the same data, the heights of a group of Year 9 students. Students use graphs to compare the heights of the two genders. The data is the same as in the previous activity. Activity Solution

Key concepts:Compare two groups using statistics. Start with the raw data and draw stem and leaf plot before introducing the technology. The raw data includes some data entry errors and students have the opportunity to manage the real data. Apps: Statistics Activity Solution

Key concepts: Use the sine, cosine and tangent ratios to solve to solve problems involving right-angled triangles. While the equations can be solved by other methods, NumSolve is encouraged here and an extension is to save the formulae in an eActivity. This is a particularly useful approach where students are finding the algebraic methods for solving the equations taking up a lot of time. Apps: NumSolve, eActivity Activity Solution

Key concepts: Draw scale diagrams to solve problems involving right-angled triangles. This technique is useful whenever a scale diagram can be used to solve the problem. Apps: Geometry Activity Solution

Key concepts: Dynamically draw a triangle to calculate slope of a line segment. Introduce geometry link in an eActivity. Extend to length of the line segment formula. Apps: eActivity, Geometry Activity Solution YouTube video demo Particularly useful for first time users of Geometry app