This may help prevent clues from being too diffiewt or vague. As a year long project, have available a set of file cards colour coded according to categories. The box of cards should be readily accessible for the students to study or contribute to as they have time. The teacher may choose to carry over the cards from year to year. The game may be played on a regular Trivial Pursuit board, a board that the class has made up, or other format such as a quiz show.
Teams take turns.
If an answer is correct, the team may'mark one segment with the appropriate symbol. The team that gets three symbols'in a row, wins a point. A variation of this game would be to designate each of the 9 ceus with a topic. The game would proceed as above, except that the team would indicate the square first, then hear the question to answer. If the answer is correct, the X or 0 may be made, if it is incorrect, the other team has the option to answer it or request another square.