ввел

In a sentence

• Он ввёл новые правила в школе.

  He introduced new rules at the school.

  Here, 'ввёл' signifies 'introduced' or 'implemented', indicating an action of establishing something new.

• Она ввела данные в компьютер.

  She entered the data into the computer.

  Here, 'ввела' (feminine past tense) means 'entered', referring to inserting data into a system.

• Учитель ввёл студентов в курс истории.

  The teacher introduced the students to the course of history.

  Here, 'ввёл' describes the act of acquainting someone with a subject or topic.