iMaths is an investigative-based numeracy program that comprehensively addresses both the content and proficiency strands of the Australian curriculum. Content strands - Number & Algebra, Measurement & Geometry, and Statistics & Probability - are developed through iMaths Topics. Proficiency strands - Understanding, Fluency, Problem Solving and Reasoning - are applied and practised through iMaths Investigations. Investigations foster deeper understanding of maths concepts, as students use critical and creative thinking skills within real-life mathematical contexts. This Teacher Book includes: notes, solutions and strategies for each Investigation; an A - E rubric for each Investigation; answers to Student Book Topics; solutions to problem solving tasks; answers to Tracker Book assessment items; and answers to readiness test.