2 BULLETIN 593, U. S. DEPARTMENT OF AGRICULTURE. 
CLASSROOM INSTRUCTION. 
Use of illustrative material. — Before students begin practice in 
judging an effort should be made to fix in their minds an ideal of 
the type (fig. 1) or breed which is being considered. Nothing else 
in this work has value equal to living specimens which approach 
perfection. The teacher should make a survey of the farms sur- 
rounding his school to learn where the best animals are kept. In 
visiting these farms the class may study methods of breeding and 
Fig. 1. — A good mutton type. 
management as well as breeds. In some cases it may be most con- 
venient to have the animals brought to the school. It will not be 
possible to study living specimens of all the breeds, neither will it 
always be convenient to have lessons with the animals present. For- 
tunately there are many pictures of prize-winning sheep which the 
teacher may use. If files are not kept of the leading live-stock jour- 
nals, clippings should be made of all good pictures and these prints 
mounted upon cards for classroom use. Such pictures as those shown 
