Im a teacher, A teacher (also called a school teacher or, in some contexts, an educator) is a person who helps others to acquire knowledge
I always wanted to be a teacher but i didnt have the patience.  What do you teach?
I teach music, but today the role of teacher may be taken on by anyone
Thats awesome! you must be really talented at a lot of things then.
I have heard  In some countries, teaching young people of school age may be carried out in an informal setting
I always thought it wouldve been cool to have been in those old one room school houses
Today In most countries, "formal" teaching of students is usually carried out by paid professionals
I dont think that teachers get paid enough
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Teachers may provide instruction in literacy and numeracy, craftsmanship or vocational training, the arts, religion, civics, community roles, or life skills.
Formal teaching tasks include preparing lessons according to agreed curricula, giving lessons, and assessing pupil progress.
A teacher's professional duties may extend beyond formal teaching. Outside of the classroom teachers may accompany students on field trips, supervise study halls, help with the organization of school functions, and serve as supervisors for extracurricular activities. 
In some education systems,
Teacher
A teacher (also called a school teacher or, in some contexts, an educator) is a person who helps students to acquire knowledge, competence or virtue.
"Informally" the role of teacher may be taken on by anyone (e.g. when showing a colleague how to perform a specific task). 
In some countries, teaching young people of school age may be carried out in an informal setting, such as within the family (homeschooling), rather than in a formal setting such as a school