4. Discussion
In much of the literature on critical thinking we see that there is no significant improvement in all the sub-tests
during one year of learning (Barak & Dori, 2009; Ben-Chaim, Ron, & Zoller, 2000). In the sub-tests of our group
we did see a marked improvement in systematicity, analyticity, and maturity. On re-examining these sub-tests we
noticed that they consisted of a group of questions involving a certain experiment where all the information was
presented in the form of tables. During this learning unit we repeatedly worked with tables and we therefore came to
the conclusion that the familiarity of the students with the tables enabled them to deal with the statements made and