(1) "Mathematical Practice Activities" in the textbooks for Grade One to Grade Six.

(2) Small-scale investigation, statistics, experiments and research. According to students' learning needs, expand the knowledge in existing mathematics textbooks.

(3) the content of the calculation.

Performance task is a task that the evaluator asks students to complete in the process of performance evaluation, which generally includes the purpose of the task, the language of task guidance, evaluation criteria and so on.