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<p>It depends on the class. Many of the math classes do not have (or need) TA’s. In a large math class, take for example 18.06 linear algebra. When I did it, it met twice per week in lecture of around 150 students, led by a full professor (Gilbert Strang taught it when I was an undergrad, and teaches it still) and then twice per week in a recitation section of about 20 students led by a professor. There were no TA’s in that class, but since there were 20 students per faculty in the recitation, you did get a chance to to interact with faculty, in a class smaller than most high school math classes. Correction: I have just checked the spring calendar [MIT</a> Mathematics | Classes](<a href=“http://www-math.mit.edu/academics/classes.php]MIT”>Course List) and discovered a change from my undergraduate time, it’s now 3 lectures and 1 recitation per week. They may have introduced TA’s as a result.</p>
<p>Whereas 18.100 when I did it, had 40 students, 2 lectures with all 40, 2 recitations with 20, and a session with the TA once per week which was optional, in groups of about 6-8 students. I certainly felt well supported.</p>
<p>Isthmus suggests that
That is simply and comprehensively wrong, and misstates the numbering used by the MIT Mathematics department. Keep in mind that departments can, and do, use their own numbering system. </p>
<p>In MIT math, the first digit after the 18 indicates the branch of mathematics. So all algebra and number theory classes are 18.7xx, all geometry and topology classes are 18.9xx, all logic classes are 18.5xx, all analysis is 18.1xx, all applied math for physics 18.3xx, and for computer science 18.4xx (the one weird exception is that 18.440-18.499 is Probability, Statistics and Stochastic Processes).</p>
<p>I can absolutely assure you that Algebra I, 18.701 is absolutely an undergraduate class, as is An Introduction to Logic and Set Theory, 18.510 or Introduction to Topology, 18.901. Indeed if you look at the mathematics course catalog ([Spring</a> 2011 Course 18: Mathematics](<a href=“http://student.mit.edu/catalog/m18a.html]Spring”>IAP/Spring 2024 Course 18: Mathematics)) you will see a highly stylized U or G in the first line of each course description to tell you if it is an undergraduate or graduate class. Also keep in mind that it is quite normal for undergraduates at MIT to try graduate level courses. Indeed, to encourage this, Juniors and Seniors are allowed to take a maximum of two elective classes as Pass/Fail subjects. This rule is designed specifically to remove the risk to an upper-class undergraduate who wishes to take a challenging graduate seminar.</p>