The activity that is not involved in teaching mathematics in the classroom is "Mathematical field trip".

Explanation:
Teaching mathematics in the classroom involves various activities and strategies to enhance students' understanding of mathematical concepts and skills. These activities aim to make the learning process more engaging, interactive, and meaningful. However, one activity that is not typically a part of the regular classroom teaching of mathematics is a "Mathematical field trip".

Mathematics Quiz:
Mathematics quizzes are a common activity in the classroom to assess students' understanding and knowledge of mathematical concepts. Quizzes can be conducted as a formative or summative assessment, and they provide an opportunity for students to apply their knowledge, problem-solving skills, and critical thinking abilities. Quizzes also help teachers identify any misconceptions or gaps in students' understanding, allowing for targeted instruction and support.

Mathematics Exhibition:
Mathematics exhibitions are interactive events where students showcase their understanding of various mathematical concepts through models, projects, and demonstrations. These exhibitions provide a platform for students to explore mathematical ideas in a creative and hands-on manner. It encourages them to think outside the box, collaborate with peers, and communicate their findings effectively. Mathematics exhibitions promote a deeper understanding of mathematical concepts and foster a positive attitude towards the subject.

Mathematics Club Activities:
Mathematics clubs are extra-curricular activities that allow students to further explore and engage with mathematics beyond the regular classroom setting. These clubs provide a space for students to participate in mathematical games, puzzles, competitions, and discussions. It fosters a sense of camaraderie among students with a shared interest in mathematics and encourages them to think critically and creatively. Mathematics club activities enhance problem-solving skills, logical reasoning, and mathematical thinking.

Mathematical Field Trip:
A mathematical field trip is not a typical activity in the classroom teaching of mathematics. While field trips can be valuable for learning in other subjects, such as science or social studies, they are not commonly used for teaching mathematics. Mathematics is a subject that is primarily taught through classroom instruction, practice exercises, problem-solving tasks, and interactive discussions. Field trips may not provide the same level of focused instruction and opportunities for practice and application of mathematical concepts as other classroom-based activities.