This study was conducted to see how the improvement of students' conceptual understanding ability taught with the Novick learning model design with a population of all students of the Mathematics Education Study Program, FKIP UHN Medan and the sample was all students who took the mathematics learning outcome evaluation course. With the random sampling technique, two classes were selected as one class experimental group and one class as the control group. The results of the study obtained were that all learning devices designed were declared valid and suitable for use, as seen from the final value of the validator as a whole, which was in the assessment interval of 4.50-5.00 , with the category of "very good". The results of the ANOVA showed that there was an increase in students' conceptual understanding abilities caused by the treatment and the results of the post hoc Scheffe test showed that at each class level interaction it was marked with the symbol (*) which means that the increase that occurred was significantly influenced by the treatment.
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