The traditional offerings for wai khru represent a symbolism of student qualities, namely:[3][4]
Ixora (khem, เข็ม) flowers, which while closed form pointed buds, symbolizing sharp wit,
Cynodon dactylon (ya phraek, หญ้าแพรก or Bermuda grass), the rapid growth and resilience of which symbolize perseverance and the ability to learn,
Popped rice (khao tok, ข้าวตอก), which symbolizes discipline, and
Eggplant flowers, which bow low when nearing fruiting, symbolizing respect and humility.
The ceremony is usually held shortly after the beginning of the first term, on a Thursday, as Thursday is traditionally the day of Brihaspati, Vedic god of wisdom and teachers