There are several educational levels in different countries around the world, but most educational systems follow a similar framework. The following are the frequently accepted levels of education:
1. Primary Education:
This is the first stage of formal education, which normally begins at the age of 5 or 6 and lasts 5 to 7 years.

2. Secondary Education:
This comes after primary school and is usually divided into two stages: lower secondary (ages 11 to 14) and upper secondary (ages 14 to 18).

3. Tertiary Education:
This is the stage following secondary education and includes higher education institutions such as colleges and universities. Certificates, diplomas, and degrees can be obtained through tertiary education.

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4. Quaternary Education:
This is the most advanced level of education and includes research degrees such as PhDs.

It is important to note that the specifics of each educational level may differ from country to country, but this is a general outline of the common educational structure found around the world.
What is the highest level of education in the world?
Postgraduate studies, including Master’s and Ph.D. programs, are generally regarded as the highest level of education in the world.
A Ph.D., or Doctor of Philosophy, is the highest academic degree that can be awarded and is typically earned through extensive research and the writing of a thesis or dissertation.
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This level of education indicates that the individual has attained a high level of expertise and knowledge in their field of study.
There may be additional levels of education above a Ph.D. in some countries, such as a higher doctoral degree or a habilitation, which is a higher research degree awarded in some countries, particularly in Europe.
However, these are relatively uncommon, and the Ph.D. is widely regarded as the world’s highest level of education.