In Jain tradition, the most commonly recited mantra before exams is the Navkar Mantra.

It is prayed for:

• calm mind
• concentration
• good conduct
• inner strength

A simple prayer before study or exam is:

णमो अरिहंताणं णमो सिद्धाणं णमो आयरियाणं णमो उवज्झायाणं णमो लोए सव्वसाहूणं

Many Jain families also do a short Vidyā / Sarasvati vandanā in their own tradition, but the Navkar Mantra is the most universal and primary Jain mantra for children in exams.