Evaluate students' performance in class. Observe students' participation, attention and enthusiasm for answering questions in class. Students can be encouraged to express their views and opinions by asking questions and discussing in groups, so as to understand students' mastery of mathematics knowledge.

Evaluate students' classroom cooperation ability. Observe students' cooperation, communication ability and problem-solving ability in group activities. Group tasks can be arranged for students to cooperate and observe their performance in the process of cooperation.

It is also an important aspect to evaluate students' classroom innovation ability and thinking development. By guiding students to carry out inquiry learning and solve problems independently, students' innovative ability and problem-solving ability are cultivated. By setting open questions, students can be guided to reflect and their thinking and development can be promoted.

It is also necessary to evaluate students' learning attitudes and habits in the classroom. By observing students' performance in class, the completion of homework and their participation in group discussions, we can understand students' learning attitudes and habits. For students with poor grades, timely guide and help them to establish correct learning attitudes and habits.

In the evaluation process, teachers need to pay attention to the following points:

We should respect students' personality differences and characteristics and avoid using a single standard to measure students.

We should pay attention to process evaluation and self-evaluation, guide students to reflect and evaluate themselves, and promote students' self-development and growth.

We should pay attention to the incentive function of evaluation, encourage students through evaluation, and stimulate their learning motivation and self-confidence.

The evaluation of open-day math class needs to be carried out from many angles, including students' classroom performance, cooperation ability, innovation ability, learning attitude and learning habits. Teachers should pay attention to respecting students' personality differences and characteristics, pay attention to process evaluation and self-evaluation, give play to the incentive role of evaluation, and promote students' self-development and growth.

Benefits of open day teaching:

1. Open teaching can overcome the shortcomings of traditional teaching and change closed learning into open learning. Its main idea is that students' mathematical activities and contents must be flexible and practical, so that each student can not only master mathematical knowledge, but also cultivate students' mathematical thinking ability according to their own ability to connect with life practice.

2. The open teaching process can enliven the classroom learning atmosphere, often change the classroom teaching mode, optimize the teaching steps, entertain and entertain, stimulate students' enthusiasm for learning mathematics and their feelings for mathematics, and achieve the goal of improving their comprehensive mathematics ability.

3. Open mathematics teaching is conducive to exploring each student's mathematical potential, helping students to communicate and cooperate more, meeting their psychological needs and cultivating their innovative thinking.

4. Open day teaching can better evaluate students' learning situation, which can be evaluated from many angles, including students' classroom performance, cooperation ability, innovation ability, learning attitude, learning habits and so on. This helps teachers to fully understand the students' learning situation, and then carry out targeted teaching.