1.1. a person who controls something, or someone who is responsible for what a particular organization
1.2. Completely in charge of the class
1.3. Example : After group work, the teacher discusses the result of task
2. Organiser
2.1. the person or group who plans and arranges an event or activity
2.2. Telling students what they should do next
2.3. Example : The teacher says, " Now we are going to do some group work, talking about our families
3. Assessor
3.1. someone whose job is to judge or decide the amount, value, quality, or importance of something
3.2. Seeing how well students perform
3.3. Example : After pair work, the teacher gives feedback about common mistakes to the whole class
4. Prompter
4.1. A person who make something happen
4.2. Encouraging students to participate, helping with answers
4.3. Example : A group of students are stuck. They can't continue the task : writing down names of animals. The teacher says, "Why don't you think about animals you see in the zoom?"
5. Participant
5.1. a person who takes part in or becomes involved in a particular activity
5.2. Taking part in an activity
5.3. The teacher sits down with one group and joins in the activity they are doing
6. Resource
6.1. a useful or valuable possession or quality of a country, organization, or person
6.2. A walking dictionary, grammar book, someone to give advice,etc
6.3. Example : The teacher presents the future tense and its use
