Assigned 
Target
date 
Read 
Exercises 

9/4 
9/11 
Fostering
Algebraic Thinking Ch. 1 
Write up three different solutions to the Golden Apples problem on p. 7 in Fostering Algebraic Thinking 
9/11 
Fostering Algebraic Thinking Ch. 1  No
new homework this week. But take a look at problem of the fortnight.
Just follow the link below. It should appear on the website anytime. 

9/18 
9/25 
Fostering Algebraic Thinking Ch. 1  Write up a solution to the Locker Problem with 200 lockers on
p. 10 in Fostering
Algebraic Thinking. Make sure you carefully explain why the lockers
that end up open are exactly the ones whose number is a perfect square.
This means you also need to explain why those lockers whose number is
not a square end up closed. Which locker(s) changed the most? Why? How
did you find them? 
9/25 
10/2 
Fostering
Algebraic Thinking Ch. 2 
Write up a solution for the Crossing the River problem on p. 11 in Fostering Algebraic Thinking. Be sure to justify each claim carefully, especially the result for A adults and C children. 
10/2 
Fostering
Algebraic Thinking Ch. 2 
Homework holiday. Prepare for the upcoming exam. 

10/9 
10/16 
Fostering
Algebraic Thinking Ch. 2 
Write up a solution to the Cuisenaire train problem. How many
different trains of length n
can you build if you distinguish between the front and the back of the
train? Justify your answer. How many trains of length n can you build out of exactly k rods? Explain why. For the following problem, we will cover the material on Thu. Suppose you have postage stamps in 7cent and 9cent denominations. What is the largest postage you cannot make by combining such stamps? Can you find a convincing reason why any larger postage can be made? Notice that this question is slightly different from the question in the text. 
10/16 
10/23 
Fostering
Algebraic Thinking Ch. 2 
Do the Crawling Snail problem on p. 31 and the Sums of
Consecutive Numbers problem on p. 37. Make sure you carefully justify
your solutions to both problems. 
10/23 
10/30 
Fostering
Algebraic Thinking Ch. 2 
Make up an Age Problem like the one on p. 3233 with your own
age. Then solve the problem to make sure that the result is indeed your
age. Can you use numbers other than 3, 5, and 7 to divide by? Carefully write up the solution of the Sneaking Up the Line problem on p. 35. In solving the Cutting Edge Problem, we gave an algorithm for cutting up a triangle into pieces and reassembling a rectangle from those pieces. In the first step of this algorithm, we cut the triangle into two pieces, from which we can assemble a parallelogram. Prove that this is really possible to do. That is, you need to show that if you follow steps 13 on p. 39 in the book, then the resulting geometric figure is really a parallelogram. 
10/30 
11/6 
Fostering
Algebraic Thinking Ch. 2 
Write up a detailed solution of the Lots of Squares problem. In the Gum Problem, explain how Jack makes two mistakes which cancel each other to give the correct answer. How could Jack fix his argument? In part 2, explain why the information given is insufficient to determine what fraction of the class is absent. Can you give upper and lower bounds on the fraction of the class that is absent? Review the Euclidean algorithm and the definition of greatest common divisor. You don't have to write anything down, just be prepared because we will use these concepts in the next class or two. 
11/6 
11/13 
Thinking Mathematically
Introduction and Ch 1 pp 110 
Read pp 132 in "How to solve it" by G. Polya. This is the
handout I gave you in class today. If you weren't there, you can find
copies on my office door. Other than the reading, this is a homework holiday. Prepare for the upcoming exam. 
11/13 
11/21 (Wed!) 
Thinking Mathematically
Introduction and Ch 1 pp 110 
This week's assignment is
to be turned in by 7 PM on Wed 11/21. You can submit it to me in
person, or put it in the envelope outside my office. 
11/20 
11/27 
Thinking Mathematically
Introduction and Ch 1 pp 1125 
Read the handout from "Knowing and Teaching Elementary
Mathematics" by Liping Ma. This is the
handout I gave you in class today. If you weren't there, you can find
copies on my office door. Write up detailed solutions of the Warehouse and Paper Strip problems in Thinking Mathematically, inluding careful explanations of the mathematical reasons for your conclusions. 
11/27 
12/4 
Thinking Mathematically
Introduction and Ch 1 pp 1125 
This week's assignment is
to be turned in by 7 PM on Tue 12/4. You can submit it to me in
person, or put it in the envelope outside my office. Write up detailed solutions to the Palindromes and Patchwork problems in Thinking Mathematically, inluding careful explanations of the mathematical reasons for your conclusions. These are for your own homework notes, you don't have to turn them in. 