One of the main guiding principles of the National Education Policy, 2020 is ‘‘The highest priority is to achieve foundational literacy and numeracy at _____ by all the students’’.

The correct option is grade 3.

Step-by-step Explanation:

The National Education Policy (NEP) 2020, launched by the Ministry of Education in India, emphasizes the foundational pillar of the education system under the National Mission on Foundational Literacy and Numeracy (FLN).

According to the policy documents, achieving foundational literacy and numeracy for all children is considered an urgent national mission. The specific target set by the policy is to ensure that all students acquire basic reading, writing, and numeracy skills by the time they complete grade 3.

Therefore, the guiding principle states: "The highest priority is to achieve foundational literacy and numeracy at grade 3 by all the students."