This study was conducted to propose a new experiment technique, which keeps the curiosity alive in students, contributes to meaningful learning instead of just verifying a scientific truth and can be done in a short time. The new proposed experiment technique that is "aim-gapped experimentation" is built on ideas derived from information-gap theory (Lowenstein, 1994; cited in Dijk & Zeelenberg, 2007). The effect of the aim-gapped experimentation to the student achievement at the 7(th) grade "Light Unit" is tested. At the end of the research, teaching with aim-gapped experimentation was found to be a technique having a positive effect on student achievement. (C) 2010 Elsevier Ltd. All rights reserved.