This research aimed to develop a handbook on the classification of vertebrates for elementary school students. This study employed a one-group pretest-posttest design. Thirty fourth-grade students were asked to learn through a conventional method for eight periods of 60 minutes each. This research was a quasi-experimental design and was conducted using one group pretest-posttest design based on cluster random sampling. The data were statistically analyzed by t-test for dependent samples.
       The result of this research found that: 1) A handbook on the classification of vertebrates had expert validation in terms of accuracy, language, content suitability, clear illustrations, classification skills, effectiveness, and the feasibility of a handbook on the classification of vertebrates is “very valid”, so that the conclusion of the validation is feasible to use; 2) the achievement of learning students in the last study by the classification of vertebrates for elementary school students was higher than before the experiment at a .01 level of significance; and 3) the satisfaction of students after learning from a handbook on the classification of vertebrates for elementary school students was higher than before the experiment at a .01 level of significance.