Bhagavad Gita being a spiritual treatise does not relate to bookish knowledge. The contents of sacred Bhagavad Gita can never be understood literally, one has to indulge in contemplation (chintan) to reach the hidden underlying meaning of sacred texts.
Bhagavad Gita says that following path of spirituality detailed in Bhagavad Gita any human being world over could reach state of enlightenment, self realization god realization. State of enlightenment announces, we as soul atman reaching state of absolute purity.
For an enlightened one the cosmic journey of life finally ends. The enlightened one can draw entire wisdom contained in cosmos through process of Shruti jnana. This concept itself dwarfs the validity of bookish knowledge. As per Bhagavad Gita education rendered in classes was meant for living the manifest physical life meaningfully.
Through bookish knowledge none can understand the ABC of spirituality.
True education as per Bhagavad Gita always comes from within. Indulging in spirituality when seekers progressed towards God, they slowly realized that one could enhance mind power to infinity, become knower of all forever. Without indulging in classroom education one can complete spiritual journey in entirety.
Journey of spirituality is an inner journey towards the spirit existing in our heart as soul atman. This spirit or the journey does not relate to bookish knowledge, prime reason why for understanding teachings contained in Bhagavad Gita and other scriptures of world, indulgence in contemplation is the only available solution.
Bhagavad Gita is against cramming. Bhagavad Gita advocates learning from within, becoming wiser day by day. Indulgence in spirituality promotes opening of dormant lying portions of brain. Normal human beings used their brain 1 to 2%, the remaining portion always lying dormant. By indulging in spirituality we can activate our brain to full capacity 100%. All enlightened ones that manifest on mother earth did so.
Any education bookish or otherwise that activates the brain and also opens dormant lying portions of brain is the right method of education.
Most human beings world over for the sake of earning their bread and butter indulged in bookish knowledge without educating themselves from within. Such a life was meaningless. We just become clerks in the journey of life, doing mundane jobs repeatedly without using our brain.