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 teacher (Name VARCHAR, Teacher_ID VARCHAR)
TABLE: CREATE TABLE course_arrange (Teacher_ID VARCHAR)

### Question ###
Show names of teachers that teach at least two courses.

### Accurate SQL ###

SELECT T2.Name FROM course_arrange AS T1 JOIN teacher AS T2 ON T1.Teacher_ID = T2.Teacher_ID GROUP BY T2.Name HAVING COUNT(*) >= 2