This document discusses the differences between skimming and scanning. Skimming involves quickly reading parts of a text like the title, subtitles, and first/last sentences of paragraphs to get the overall idea. Scanning is searching for specific information by quickly glancing over a text without reading every word. The key difference is that skimming is used to get the general idea while scanning looks for particular details. Both techniques can be used to speed read large amounts of material.