1. Accelerating the development of formal thinking in middle and high school students;Adey;Journal of Research in Science Teaching,1990
2. Really raising standards: Cognitive intervention and academic achievement;Adey,1994
3. Benchmarks for science literacy: Project 2061,1993
4. Cognitive psychology and its implications;Anderson,1980
5. Formal operational reasoning modes: Predictors of critical thinking abilities and grades assigned by teachers in science and mathematics for students in grades nine through twelve;Bitner;Journal of Research in Science Teaching,1991