If it were only necessary to decide whether to teach elementary science to everyone on a mass basis or to find the gifted few and take them as far as they can go, our task would be fairly simple. The public school system, however, has no such (1) , for the jobs must be carried (2) at the same time. Because we depend so (3) upon science and technology for our (4) , we must produce specialists in many fields. Because we live in a (5) nation, whose citizens make the policies for the nation, large numbers of us must be (6) to understand, to uphold, and (7) necessary, to judge the work of (8) . The public school must educate both producers and (9) of scientific services. In education, there should be a good balance (10) the branches of knowledge that (11) to effective thinking and wise judgment. Such balance is defeated by (12) much emphasis on any one field. This (13) of balance involves not only the (14) of the natural sciences, the social sciences and the arts but also (15) emphasis among the natural sciences themselves. (16) , we must have a balance between current and (17) knowledge. The attention of the public is continually drawn to new (18) in scientific fields and the discovery of new knowledge; these should not be (19) to turn our attention away from the sound, established materials that form the basis of (20) for beginners.