Teaches boys and gIrls how to care for their family
Teaches boys and girls how to care for themselves
Source of job e.g clothing and textile
Teaches them the nutritional importance of food
Teaches them how to plan there daily activities 

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If you do not know about home economics which is home management you will not know about your surroundings or even clean it up for example after doing your practicals,you will need to clean it up because it will be messy.In home economics you must know hygiene...