There have been some major changes among the nation's schools in the past 20 years. These include (a) appearance of paraprofessionals; (b) new instructional technologies; (c) varying levels of desegregation; (d) federal funding accompanied by federal control; (e) larger school districts; (f) more informal instructional arrangements; and (g) unionization of teachers.
Winter (December) 1981
Iowa Science Teachers Journal
© Copyright 1981 by the Iowa Academy of Science
"A 5-Year Comparison Study of Iowa High School Science,"
Iowa Science Teachers Journal: Vol. 18
, Article 9.
Available at: https://scholarworks.uni.edu/istj/vol18/iss3/9