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A how-to is an informal, often short, description of how to accomplish some specific task. They are generally meant to help non-experts, and may leave out details that are only important to experts, and may be greatly simplified from an overall discussion of the topic. See procedural knowledge for a discussion of what sort of knowledge is imparted, and how far it can be imparted, in how-tos.

Other types of instructional documentation include FAQs, manuals and guides. Wikipedia contains some procedural knowledge, partially listed below. For a list of how-tos related to Wikipedia itself, see . Many additional how-tos can be found at Wikibooks:Main_Page .

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1 Science and teaching

• Constructing school science lab equipment
• Making up solutions
• Care of living organisms in a school

1.1 Biology

• Apparatus for demonstrating osmosis using Visking tubing
• Bell jar model lungs
• How to distinguish a monocot from a dicot
• Nail varnish impressions of stomata
• Paper chromatography of amino acidsChromatography This is a description of how to use paper chromatography of amino acids (to identify amino acids). Aims To demonstrate separation of amino acids by paper chromatography To use chromatography to identify amino acids Materials Chromatography
• Prepare an onion tissue slide1 forceps, dye, pin, onion membrane, slide Fig. 2 Microscope This activity is one of the first uses of an optical microscope that most students encounter in a biology lab. Onions are used because they have large cells that are easily visible under a micro
• Prepare a wet mountA microscope slide is a thin sheet of glass used to hold objects for examination under a microscope. A standard microscope slide (shown on the right) is 75 x 25 mm (3" X 1") and 1. A range of other sizes is available for various special purposes. Since co (microscopy)
• Testing leaves for starchTesting leaves for starch is an experiment that is usually performed in school science laboratories, by pupils grade 7-9. It is a simple experiment that works well in the summer but can be disappointing in the winter months when leaves make little starch.
• Using water snails and pond weed to investigate the carbon cycle
• Winkler test for dissolved oxygenThe Winkler test is used to determine the level of dissolved oxygen in fresh water samples. What follows is a set of instructions on how to perform the test. Materials Stage 1 Manganese(II) sulfate 48% Potassium iodide 15% in potassium hydroxide 70% Sampl
• How to demonstrate osmosis
• Showing CO₂ is produced by respiration using huff n puff apparatusThis Huff and Puff Apparatus is used in school biology labs to demonstrate that carbon dioxide is a product of respiration. A pupil breathes in and out of the middle tube. The glass tubing is arranged in such a way that one flask bubbles as the pupils bre
• Measuring transpiration with a potometerA potometer is a device used for measuring the rate of water uptake of a leafy plant shoot. The main reason for water uptake by a cut shoot is transpiration. By changing the surrounding atmospheric conditions. The effect on transpiration of wind, heat, an