Skimming: Read heading, pictures, captions. Read introduction and conclusion. Read first and last sentences of paragraphs.
Reading rapidly in order to get a general overview.
Scanning: Find numbers, names, places, etc. Answer questions. Look for key words in questions and scan the passage for the same key words. Answers are usually found around the key words.
Look for answers to only one question at a time. Scan separately for each question.
Reading rapidly in order to find specific facts.
Read: Highlight topic sentences (sentences opening paragraphs).
Underline key words. Circle linking words. Make notes. Answer questions.
Remember; this is going to be far more time consuming than scanning or skimming!