A Teacher Caught up in a Class Summoning Repairs the Mechanical Girl With His Useless Skill is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on ManhwaZ fastest updating comic site. The Summary is
A Teacher Caught Up in a Class Summoning Repairs the Mechanical Girl with his Useless Skill The whole class was transferred to a different world. The teacher, Aizawa Seiji received a failure skill [Repair]. He was treated as a burden until his skill was activated in the ancient ruins! The Android girl awakened and slaughtered the Minotaur!! They tried to escape via the teleportation device but ended up on unknown grounds. Aizawa brought the Android Girl, Brynhildr, with him to travel around the other world!