A teacher performs practically and explains in the

When a teacher performs an act practically and explains it while doing so, the method is the demonstration method.

Seeing the process performed with running commentary links action to explanation and aids understanding.

The lecture method is purely verbal exposition and involves no practical performance before students.

The discovery method has learners find out for themselves, whereas here the teacher shows and tells.

The problem-solving method centres on tackling a defined problem, not on a teacher demonstrating a process.

Demonstration follows a show and tell logic and is common in science, craft and skill based teaching.