Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE teacher (Name VARCHAR, Teacher_ID VARCHAR); CREATE TABLE course_arrange (Teacher_ID VARCHAR)
### Question:
Show names of teachers and the number of courses they teach.
### Answer:
SELECT T2.Name, COUNT(*) FROM course_arrange AS T1 JOIN teacher AS T2 ON T1.Teacher_ID = T2.Teacher_ID GROUP BY T2.Name