Sanjay Kumar Sinha is a Guinness Record Holder in the field of teaching grammar.In fact he holds two world records: 1)The Longest grammar teaching in the world for 73 hours and 37 minutes.2)The Fastest grammar teaching in the world. (lbr)He has already written a few books of grammar e.g. The King's Grammar, The Queen's Grammar, The Prince's Grammar, The Princess' Grammar.He attempted the Guinness World Record for the longest grammar teaching in the world on 20th October 2005. The grammar class was started at 10 am and continued for 73 hours and 37 minutes. They started with 73 students but because of medical problem only 59 students could continue for 73 hours till the end of record breaking session. The students were also supposed to sit and learn the grammar lesson during entire the event. Two doctors, two nurses, two stewards two observers and representatives were given the task to observe and scrutiny the event carefully and cautiously.On 23rd October 2005 the world record was broken and thus the author along with his 59 students got a place in the Guinness Book of World Record. More than 10000 questions were discussed and solved with the correct answers during the entire record breaking event.On 31 Jan 2003 he had attempted the world record of the fastest grammar teaching where around 1000 students studied the fundamentals of grammar within the shortest period of time. All 1000 students were tested after the record breaking event and found all of them getting 100% result. His unique style of teaching has already got space in the heart of millions of students round the world. He teaches about 20000 students in Thakur Educational Trust yearly.