The document provides information and examples for describing data trends in IELTS writing tasks, including useful phrases for describing increases and decreases. It discusses noun phrase + verb + adverb structures like "The price of oil rose sharply" and "There was a sharp rise in the price of oil". Grammar structures A and B are presented for describing changes, noting that structure B does not always require an adjective. Examples are given showing how the verb and adverb can be reformulated while expressing the same idea. The document concludes by recommending an activity on making approximations and to bring a line chart to the next class.