28 TEACHING SCIENCE IN SECONDARY SCHOOLS

 4. Making provision for individual interests and abilities.
 5. Planning liberal displays in classrooms, hallways, and
 other public places, changing these frequently.
 6. Adopting varied devices that will arouse interest such
 as question and answer boxes, reference and clipping files,
 and novel approaches.
 7. Accepting unexpected opportunities for timely discus-
 sions. (If something turns up suddenly, use it.)
 8. Explaining com- /"
 munity problems,
 particularly in
 health matters. R
 9. Encouraging vigor-
 ous discussions, par-
 ticularly after dem- 1
 onstrations. -[
 10. Adding regularly [--
 to each student's
 vocabulary by sci- SOMETHING TORS- UP
 entific terms, care- SUDDENLY- USE IT
 fully explained.
 (Study technical names and local common names in
 parallel.)
 11. Preparing lists of supplementary reading for practice in
 looking up material and reading for pleasure.
 12. Encouraging students to build a personal library and
 collections.
 13. Steadily enlarging the classroom library with books,
 bulletins, magazines, and other published materials.
 14. Keeping the bulletin board current with (a) material
 relating to subjects under discussion, and (b) items of
 daily interest.
 15. Using audio-visual aids effectively, in cooperation with
 related science areas.
 16. Remembering that the best teaching aids in biology are
 actual specimens.