Activities and problems are interspersed with commentary in this book on the learning and teaching of mathematics. The emphasis is on helping students to enjoy mathematics through an awareness of structure and patterns. The chapter titles are as follows: (1) "My Three Sons--A Game"; (2) "The Tower Game"; (3) "Mathematical Games on a Different Planet"; (4) "Computation as a Language Art"; (5) "Some Beginnings of Computation"; (6) "The Addition Table--Its Patterns"; (7) "Addition and Subtraction Without Borrowing"; (8) "The Multiplication Table Revisited"; (9) "Factors and Multiples--An Alternative Look at Previous Work"; (10) "Multiplication of Large Numbers"; (11) "Division--Another Creative Activity"; (12) "Fractions Are Not Parts of Wholes"; (13) "Operations on Fractions, When Representing Rational Numbers"; (14) "Decimals--Number Names Using Dots"; (15) "Per Dozens, Per Kilometers, Per Cents"; (16) "Exponents--Small Number Names Up High"; and (17) "The Problem of Problems." (MNS)