Problem-based learning is a powerful alternative to drill-and-practice or skills-based learning, especially within mathematics. But, it can be difficult to source rich materials that engage an entire class. The Creative Activities in Mathematics series, which is based on Australian research, provides a wealth of investigations and open-ended, active learning activities, designed to engage students with mathematics and develop their problem-solving, collaboration, and mathematical skills. Book 3 provides different class activities for students in lower and middle secondary school. Each activity is a whole-class investigation with open-ended answers that takes a particular scenario and develops it over three levels. This enables each activity to be used both at different year levels and with students of differing ability in the same class. Presented in three volumes which also include teaching notes and staged lesson plans, the activities are firmly rooted in the Australian mathematics curriculum and are linked to the content descriptors for the strands of Number & Algebra, Measurement & Geometry, and Statistics & Probability. A companion website provides links to additional information and problem-based activities from the internet, as well as student-friendly activity worksheets for teachers to download and print for their classes. [Subject: Education, Mathematics]