The prelims of Shaastra Spark, a technology-related quiz-cum-puzzle competition for students from classes 8 to 12 as part of Shaastra, the technical fete of the Indian Institute of Technology, Madras, will be held at Jyothis Central School, Menamkulam, here on July 9. Registration for the event is free, and will get under way at 7 a.m. The competition will begin at 8 a.m. The top three teams will get cash prizes. The winning team will get a chance to take part in the national final to be held at IIT, Madras.