Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE course_arrange (Name VARCHAR, Teacher_id VARCHAR)
TABLE: CREATE TABLE teacher (Name VARCHAR, Teacher_id VARCHAR)

### Question ###
List the names of teachers who have not been arranged to teach courses.

### Accurate SQL ###

SELECT Name FROM teacher WHERE NOT Teacher_id IN (SELECT Teacher_id FROM course_arrange)