80 TEACHING SCIENCE IN THE ELEMENTARY SCHOOL

 Pathways in Science
 Book II. The Story of Weather 95-130
 The Story of Ground 153-188
 Book III. Plants and Animals of Long Ago 59-100
 The Earth We Live On 225-236
 Book IV. The Earth 3- 48
 The Changing Earth 49-102
 Book VI. Layers of the Earth as a Story Book 70-110
 Men Discovered Much About the Earth 257-284

HI. Matter and Energy Are Subject to Change
 Wonderworld of Science
 Book I. The Air Around Us 21- 60
 Book II. Water and its Form 63- 81
 Magnets 82- 94
 Book III. Heat 65- 86
 Making Work Easier 87-116
 Book IV. Electricity 67-106
 Light 107-130
 Book V. Changes All Around Us 67-106
 Air 106-148
 Conservation 213-248
 Book VI. Food for Growth and Energy 7- 42
 Electricity and Its Uses 83-130
 The World of Sound 131-162
 Pathways in Science
 Book I. Heat and Cold 87-116
 Working with Machines and Magnets 117-140
 Book III. Magnets and What They Do 85-110
 Book IV. Two Forces Which Man Has Put to Work 275-298
 Book V. What are Magnetism and Electricity 111-142
 Around Us 195-238
 Book VI. Men Have Learned Many Things
 About Electricity 284-310
 American Health Series
 Book III. Power for Work 55- 57
 Yeast Plants and Alcohol 69- 71
 Sound Waves 125-126
 Book V. A Lesson from the Doctor (digestion) 175-180
 Book VI. How Plants Make Food 59- 61
 What Foods Do 61- 64
 How the Body Uses Food 87-105
 Light and Sound 1- 58
 How Teeth Decay 113-115
 Air and Oxygen 159-171
 Health Hazards in the Air
 (carbon monoxide) 75-180
 The Effects of Exercise
 (oxygen, carbon dioxide, lactic acid) 95-198
 Checking Important Facts about Muscles
 and Exercise (carbon dioxide, lactic
 acid) 219-220
 Health, Happiness and Success Series
 Book IV. What Is Alcohol 219-220
 Book V. Alcohol (fermentation) 246-247