'Teach' generally refers to the process of facilitation of learning and transferring knowledge, skills, or information to someone by explaining, demonstrating, or guiding them through a subject or topic. For example, you 'teach' a subject such as math, English, classical literature, etc. or teach a skills such as driving, riding a bike, cooking, etc. 'Instruct' is typically concerned with providing specific, clear, step-by-step directions or guidance to someone to enable them to carry out a particular task or activity. It is concerned with enabling someone to do something at the moment and unlike teaching, does not try to instill long-term abilities. For example, a manual 'instructs' you on how to initiate an appliance, or a recipe instructs you on how to cook a meal, but does not teach you the skill of cooking. Here are some examples:
She
The professor
The manual
She
This sentence implies that she gave step by step guidelines on how to prepare the presentation.
She
This sentence implies that she explained how the presentation should be prepared.
'Educate', on the other hand, goes beyond the specific act of teaching or instructing. While teaching and instruction are typically applied in specific subject areas or skill domains, education is a more comprehensive process that can be applied to various aspects of life, including academic subjects, social skills, values, and personal development. However, educating can be more indirect than teaching or instructing. It can target a larger audience and be done through means such as mass media, pamphlets, signs in public spaces, etc.
The film aims to
The organization aims to
You cannot 'teach' or 'instruct' health issues to the public as it is not a specific subject of study or a practical task.