Purpose: In this study, we presented the Design Thinking model called DITC (Design Thinking in Class) and conducted an experiment during one month with 197 engineering students at Hanoi University of Technology (HUST) to determine how this model could aid in the growth of problem solving and teamwork mindset in a flipped classroom. Method: A Design Thinking mindset questionnaire was given to 197 participants before and after this model was applied. A t-test was used to analyze the data. Findings: the DTIC model fostered students' mindsets such as empathy, holistic view, problem reframing, and teamwork. Students showed very positive feedback and reviews on the model. Implications to Research and Practice: DITC can assist students in grasping Design Thinking concepts, allowing them to understand real-world problems more effectively. This model can be used to support teamwork and problem-solving skills for online learning environments, especially during the COVID-19 pandemic. We also included some suggestions for incorporating Design Thinking into the classroom so that this model can be applied more widely.