The International Pi Day Celebration
合肥加拿大国际学校国际圆周率日庆祝活动
“Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159.”
在每年的3月14日，世界各地会举办国际圆周率日庆祝活动。圆周率，一般以π来表示，是一个在数学及物理学普遍存在的数学常数。它定义为圆形之周长与直径之比值3.14159。
Students across all grades (K-12) participated in teacher-led activities in order to introduce the concept of “Pi.” Each grade level participated in age-appropriate activities reflecting a wide variety of activity.
每个年级的学生都参与到了庆祝国际圆周率日的适龄活动中。
Kindergarten: students started the day with creating their own circular-shaped pizzas. All of the pizzas made turned out delicious, and with a variety of different toppings.
幼儿园：这一天，孩子们制作了圆形披萨。所有的披萨加上多种调料烹制出来，美味极了！
The goal of these activities was to promote awareness to students regarding the prevalence of circles in their daily life. Furthermore, students ultimately were made aware of the word “Pi” and its associated symbology.
这些活动的目的在于提高学生对其日常生活中圆形的认识。此外，学生也认识了这个词“PI”及其相关的象征意义。
PYP: students within the PYP program were all exposed age-appropriate events, which included, and wasn’t limited to:
PYP:学生体验到了与他们年龄相符的庆祝活动，其中包括（但不限于）：
Discussed important vocabulary related to circles like diameter, radius, circumference etc.
讨论重要的词汇表，讨论与圆相关的重要词汇，如直径、半径、周长等
Measured circle circumference with sting and compared lengths,
测量圆的周长和比较长度
Online games that included circumference activities
涉及到圆周活动的线上游戏
Songs and educational stories were used
相关的歌曲和教育故事
Graphing and recording collected data after measuring was done
测量结束后，对收集的数据进行绘图和记录
Eating circle shaped snacks
品尝圆形小吃
PYP students had the opportunity after lunch to decorate some pies with fruit and cream and make the PI symbol. Everyone had pies for dessert!
午餐后，PYP的学生还用水果和奶油装饰披萨，并做成π的形状。每个人都品尝到了亲手制作的美味披萨！
MYP & High School: students within the MYP program also participated in age-appropriate activities, which included, but not limiting to:
MYP & 高中： MYP学生也参加到了适龄活动中，其中包括（但不限于）：
Grades 6 students explored the concept of circumference with hula-hoops; rolling hula hoops to determine distance traveled. All activities were arranged for each respective classroom
六年级的学生通过呼啦圈探索发现周长的概念，滚动呼啦圈以确定行驶距离。每项活动都安排在不同的教室进行。
Grade 7-8 students also explored the circumference of a circle with hula-hoops, but further added details regarding radii and ratios; Pi Day bingo activities, songs, and digits-of-pi memorization was orchestrated within their respective classrooms
七年级和八年级学生也通过呼啦圈探索发现周长的概念，但相对于六年级孩子，增加了有关半径和比率的细节；国际圆周率日bingo活动、歌曲及π数字记忆活动分别在学生们各自的教室里进行。
Grades 9-10 students cooperated with the upper high school students during the first two periods of the day, participating in the following activities:
九年级和十年级学生，在庆祝日当天的前两个时间段内，与高中的学生进行合作，参加以下活动：
Digits-of-pi memorization
π数字记忆活动
Monte Carlo simulation competition for the estimation of the value of pi
蒙特卡罗模拟竞赛，用于估算圆周率的值
Circumference and displacement activity with hula-hoops
呼啦圈的周长和位移活动
Grades 11-12 students, in addition to the described activities above, acted as moderators for the younger grades, as they have all studied concepts related to “pi” extensively in their math courses.
十一年级和十二年级学生除了参加上述活动外，他们还担任了其他年级学生活动的主持人，因为在数学课上，他们已经学习了和π有关的概念。
Overall, each grade participated in the decoration of pies after their lunch period. Most students created their pies with a competitive edge, as each classroom would compare their culinary artistry. Following classroom photos, students returned back to their homerooms for the consumption of their creations.
总的来说，每个年级的学生都在午餐后参加了披萨装饰活动。学生们亲手做的披萨都特别有创意，每间教室的披萨都会拿来“一较高下”，看看哪个更好看，哪个更香甜！拍完教室照片后，孩子们还可以把他们自己做的披萨带回家品尝。
Written by作者:
Mr. Derek James Berthel (Mathematics Department Head 数学组主任)
& Mrs. Kathryn Viljoen (Numeracy Lead for Kindergarten/PYP 幼儿园/小学数学组长)
