A second change in mathematics that has begun to affect the secondary curriculum is the emergence of problems in counting, scheduling, and organization that go headings of finite or discrete mathematics. Here, too, there is a problem of integration the curriculum, but not because of the reasoning or even because of the are into deductive and algorithmic. But the algorithms applications, for this mathematics is quite new, not known to many teachers and often not known to the mathematicians who train them, and they overlap enough with computer science to bring about questions of turf and where they should be taught.