This teacher's manual represents the first of a three-book series. It is written for third grade educators. The arrangement of lessons allows flexibility and enables the teacher to repeat lessons when necessary and to review thoroughly any exercise in which pupils need additional practice. The Manual aims to help educators make their teaching more…

That which legislation many times fails to accomplish with adults, organized public education achieves through children. There is no better way, and perhaps no other way, to save the Nation's natural resources from three centuries of ruthless exploitation than by a program of adequate instruction in the Nation's schools. Children cannot begin too…