Data handling

This CTET Paper 2 chapter builds Data handling for future Classes VI-VIII maths teachers: purposeful collection and organisation, tally marks and frequency tables, pictographs with keys, bar and double-bar graphs, Class VIII pie-chart reading, mean median mode for ungrouped data, light chance language, pedagogy of scale and pictograph-key traps with TLM, and hard classroom CTET stems. Sibling topic Data (c1-1-06) stays a one-line contrast only.