The World Bank Speaker's Bureau offers briefings to visiting schools and universities on selected Tuesday and Thursday mornings throughout the year. Visitors are given an overview of the Bank Group's history, it mission and challenges, followed by a question and answer session. Groups must be 15 persons or more and space is on a first-come, first-served basis. Groups may be combined, wherever possible. Groups of 50 or more persons should allow at least a month's notice and may be accommodated separately.