Vietnam's new general education curriculum was just released in 2018, focusing on developing students' qualities and capabilities. Chemistry is an experimental science, thus developing and assessing students' experimental competence in teaching chemistry is a very important task. Based on the experimental competence scale, the article introduced and illustrated the assessment tools for this competence including student worksheets, observation sheets, and special tests. To pilot evaluation tools, we use specifically pre-test, post-test, and worksheets affecting 63 students in grade 12 of 2 high schools in Ben Tre Province, Vietnam to collect evidence to assess students' experimental competence. Thereby assessing the feasibility and effectiveness of constructed tools.