Data cycle, what is data, sources, examples, keywords - data, population, sample, questionnaires & questions, raw data, frequency table, tallies, intervals, range of data values, completing tables, stem-and- leaf method, exercises, maths percentages, working with intervals, summarizing data - mode, median, bi-mode, mean, measures of dispersion, range, central tendency, formula for mean, measuring dispersion. Excellent for classroom teaching wit a data projector & for use on a mobile.