The major recommendation of NEP 2020  for School Education are:

• In this system, there will be 12 years of Schooling with 3 years of Anganwadi/Pre-Schooling.
• The new system will have four stages namely Foundational Stage (three years of Anganwadi or pre-school followed by classes 1-2), Preparatory Stage (classes 3-5), Middle Stage (classes 6-8) and Secondary Stage (classes 9-12)
• No separation between the Science, Arts and Commerce stream.
• To build Internship and Vocation training courses from class 8.

These are some of the rules regarding school education.

To know more about the NEP 2020 you may visit the link below:

https://news.careers360.com/nep-2020-what-does-it-say-about-schools-and-universities

I hope my answer helps. All the very best for your future endeavors!