2009年美国众议院将每年的3月14号设定为“圆周率日”(Pi day)，它是庆祝圆周率π的特别日子，这一天同样是爱因斯坦的生日。如果说节日是为了庆祝，那π Day则是对获取知识和智慧的庆祝。
In 2009, US House of Representatives stipulated that March, 14th every year is Pi Day.It is a special day for the celebration π. Coincidentally,Albeit Einstein was also born on March 14th. If the aim of festival is for celebration, π Day is the one people celebrate for knowledge and wisdom gains.
长春市实验中学加拿大高中，为弘扬数学科学文化，激发学生学习理科的兴趣和研究热情，锻炼学生的记忆力，3月14日下午13：00，举办了一年一度的数学科学活动日，全体师生积极参与。
In order to promote and stimulate students’ interest and passion for math and science learning and to enhance their memory, Changchun Experimental School High School International division held annual activity for mathematics at 1 p.m. March 14th. All teaching staffs and students actively took part in it.
本次活动分为9个分赛场，分别是数独、五子棋、看图猜成语、逻辑推理、图形推理、数字推理、海报设计、纸飞机和π的小数点默写。以两种方式进行，班级赛和个人赛。为了在班级中选出优秀的代表，各班组织了班内比赛，选出代表班级出战的同学。无论是班级赛还是个人赛，参赛的同学都积极对待，争分夺秒，为了班级荣誉和个人荣誉奋斗。
9 classrooms were used for this activity which included sudocu, Chinese chess,idiom guess from pictures, logical reasoning, graphic reasoning, numerical reasoning poster design, paper aeroplane folding,decimal point dictation of π.This activity included two types. Class contest and individual contest.Every class organized its own contest for the selection of the excellent competitors who can represent their class for the class-to-class contest.No matter what type of contest it was, all participants actively took part in it for the honor of their class and themselves.
数独是源自18世纪瑞士的一种数学游戏。是一种运用纸、笔进行演算的逻辑游戏。玩家需要根据9×9盘面上的已知数字，推理出所有剩余空格的数字，并满足每一行、每一列、每一个粗线宫（3*3）内的数字均含1-9，不重复，验同学的数字能力及推理能力。
Sudocu is a math game that originated from Switzerland in 18th century. It is a logical game that uses paper and pen to perform calculus. Players need to deduce the number of all remaining spaces based on the known numbers on the 9 * 9 disk, and meet the figures in every row, column, and every rough line (3*3), which contain 1-9, no duplication, which can test numeric ability and reasoning ability of the students.
为了让学生在学好数学的同时更多的了解中国文化，所以举办了五子棋和看图猜成语比赛，同学们纷纷踊跃参加，五子棋比赛同学们的实力不相上下。
In order for the students to know more about Chinese culture while learning math, International Division held contest for idiom guess from the pictures and Chinese chess playing. Students actively took part in it. It is really a fierce contest.
逻辑推理、图形推理、数字推理考验的是学生的推理能力，同样也考验学生的理解能力和答题速度。
Logical reasoning, figure reasoning, numerical reasoning test the students’ competence of reasoning and speed of question answering.
Pi Day海报设计:每班派三名学生参赛，根据外教现场给的主题进行研讨方案，在规定时间内分工合作完成海报，并由外教评委集体打分。
Pi Day poster design: Every class sent three students for the contest. The students should discuss and formulate a scheme given by the foreign teachers. Foreign teachers should grade a student’s work. The poster design should be complete in a given time.
纸飞机比赛是每名同学用给定的纸张，利用自己所学到的物理知识，叠出心仪的飞机，进行PK，根据飞行距离判断胜负。
Paper plane contest is the one that students fold a satisfactory paper plane by using the Physical knowledge they learned in class.
Pi Day最经典的比赛就是π的数位默写，考验同学的记忆能力，在规定的时间内，默写出最多位数的则胜出，根据位数名次积分累积到班级总分中。
Pi Day is a classical match.The amazing part of this game is to write the digital points of π.In a given time,the winner is the one who write most digital points.
班级团体赛结束后，为学生个人赛，学生针对自己感兴趣的项目进行参赛，评选国际部单项冠军，同时通过参加多项比赛还可以评比综合实力冠军，比赛现场十分火爆。具体分数及排名情况见下回分解！
After the end of the class team competition, the students go on competing for the projects that they were interested in, and the international single champion was selected. At the same time, they could compete for the comprehensive strength champion through many competitions, and the atmosphere of competition scene is very tense. Specific scores and rankings will be shown later!
