The article presents the potentials of stem education and the level of application stem education in teaching mathematics at schools in vietnam. Based on general education curiculumn, mathematics education curiculumn, teaching facililities at schools, we conducted a survey to investigate the real situation of stem education in some schools and suggested some solutions for teaching mathematics in the classroom which connected to stem education. The research results have shown three levels of teaching mathematics in stem classroom. We have offered the procedure of teaching mathematics in the classroom and designed some stem activities that integrated science, technology, engineering and mathematics knowledge. We have realized that our approach could be implemented in teaching mathematics at schools in the context of renovating general education curriculum in vietnam. Published under licence by iop publishing ltd.