many teachers in this modern day life especially in maths use technology. Example in highschool maths the teachers use the smartboards and their laptops to use interactive online websites such as hotmaths and let the students have fun with theirlearning
Use do when the subject of the sentence is plural eg We do, They do, The teachers do. Use does when the subject of the sentence is singular eg He does, She does, It does, The teacher does. The teacher does nothing all day. The teachers do nothing all day.