This study aims to determine the feasibility of a model of blended learning applied mathematics using schoology for vocational education using the 4D model development method that includes the four Ds steps, namely Define, Design, Develop, and Disseminate. The research was conducted at the Politeknik Negeri Bali where the data were collected using a validation sheet and student response questionnaire sheet. Data were analyzed descriptively. As a result, the design of applied mathematics blended learning using schoology achieved: feasibility level of 84.91% (feasible), practicality 78.84% (practical), and the compliance was 88.02% (very helpful). This implies that blended learning applied mathematics is very appropriate to be used as a model of learning in vocational education. The design development can be continued to the stage of effectiveness testing, evaluation and dissemination.