Unit 1 1
Big Bucks the Easy Way 1
Unit 2 45
Deer and the Energy Cycle 45
Unit 3 79
Why Do We Believe That the Earth Is Round? 79
Unit 4 116
Jim Thorpe 116
To Lie or Not to Lie-The Doctor s Dilemma 155
Unit 5 155
Unit 6 193
How to Mark a Book 193
Unit 7 254
The Luncheon 254
Unit 8 322
The New Caves 322
Unit 9 358
Journey West 358
Unit 10 390
Why People Work 390