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I am teaching Mathematics for undergraduate students at social sciences. I have two choices. I can publish all old exams with their solutions on my personal weblog or preventing students from obtaining them with tied control over students during making exam.
When old exams would be published my students may be familiar with my question style and may be succeed there. In contrast, when them be public, students may concentrate on questions only and forget learning of all mathematics. Also when exams be published old students may feel bad because of their bad chance that hadn't old exams texts.
For effective teaching and motivation of students, is it good idea that old exams be published by me or not? Shall I publish exam answer keys too? may publishing answers cause memorization instead of learning?