The educator who put forward the whiteboard theory is Locke, an outstanding British philosopher and thinker. The main content of whiteboard theory is that Locke thinks that at the beginning, his mind is like a clean whiteboard. With the increase of experience, ideas and marks will appear on the whiteboard, which explains the argument that knowledge comes from experience.

Only through experience can the mind have ideas, so experience is the only source of ideas. He abandoned Descartes and others' natural concept theory, and thought that the human mind was like a blank sheet of paper from the beginning, and it was experience (that is, his so-called concept) that provided its spiritual content.

There are two concepts: the concept of feeling and the concept of reflection. Feeling comes from the sensory perception of the external world, and reflection comes from the observation of the mind itself. Unlike rationalists, Locke emphasized that these two concepts are the only source of knowledge.

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Locke also advocates that the nature of the senses can be divided into "primary nature" and "secondary nature". Locke believes that the world is made of matter, and the main properties of matter include those that are inseparable from matter, such as shape, motion or stillness, number and so on.

Secondary properties include color, sound, smell and other attributes. Locke believes that the first sex is in the object and the second sex is only in the perceiver. Locke followed Descartes' dualism on this issue and agreed that some properties can be understood by human reason.

Although Locke's philosophical thoughts are inconsistent (another British philosopher, Bertrand Russell, once criticized Locke for "dealing with philosophical problems in a piecemeal way" in the 20th century), there are many loopholes.