上海星河湾双语学校G2-G4年级数学探索，数学之美，美不胜收，唯放眼观之；数学之妙，妙不可言，唯与其交融。数学与生活相互交融，因为本次数学学科活动以“我是小小采购员”为主题，让学生在实际生活中感受数学、理解数学、享受数学。
近一个月来，二年级的小朋友们在数学课堂上学习了图表统计， 加减乘除的计算与应用等相关知识。基于一年级已经学过的人民币知识， 结合二年级学生现阶段数学知识的掌握和能力水平，老师们精心策划了这次有趣的数学活动——让每位小朋友体验一次家庭“小小采购员”的角色。在这次活动中，小朋友们全程独立选购商品，记录商品单价， 自己核算总价，完成付账找零，并将相关数据以图表的形式记录在采购清单当中。
真实场景更能引发孩子主动探索和思考的欲望，更能感受数学的价值，激发学习数学的兴趣。本次活动将课堂上的数学知识结合到实际生活中，不仅巩固了数学计算和解决问题的能力，而且让小朋友们承担起家庭的责任，丰富了孩子的生活经验。
G3
迷你双十一，“数感”与“运算”
为了激发小朋友们对数学的兴趣、培养数学应用能力，同时结合近期学习的乘除法、估算、单价、数量、总价等相关内容，三年级举行了“迷你双十一”活动，旨在让孩子们体验买卖交易过程，用劳动赚取报酬，培养算数运算能力和理财观念。
周四，在老师的指导下，同学们完成了宣传海报的制作。利用单价、数量、总价等相关内容，大家制作出了涵盖物品名称、库存数量、单价以及满减、买赠、第二件半价等优惠信息的精美海报。从“爆单BIG SALE”到“MINI杂物社”与“米奇淘淘屋”，每一张精美海报的背后都是同学们一笔一划的认真与热情。
周五，买卖货品环节正式开始！活动会场采取两两串班的方式，各班以小组形式摆放摊位，以个人为单位买卖货品。风格迥异的摊位、琳琅满目的商品和热情洋溢的笑脸，形成了本次“迷你双十一”活动中的靓丽风景线。为了能让自己的商品成为“爆款”，同学们纷纷拿出了“十八般武艺”，体会了一把当“掌柜”的快乐。
G4
双十一购物节，数据应用“市场”
在“双十一”购物节活动中，四年级学生经历了提出问题、调查、收集数据、分析以及应用信息等一系列过程，意识到了在大数据时代中数据的意义和重要性。通过供求、价格、竞争等机制感受“市场”的力量。
市场调研：
同学们通过问卷调查进行了小范围的市场调研，使用所学过各种图表分析顾客群体的购物倾向，总结“卖家三法宝”：利润多！成本低！库存要适当！最终筛选出了人气MAX、成本MIN、利润MAX的货品。
“购物节”活动热火朝天地进行，小小卖家们和买家们纷纷拿出自己的看家本领，立志完成自己的任务。
数据分析：
活动结束后，同学们根据销售和购买记录进行了数据分析，与市场调研结果进行对比分析，总结经验，获得启发。如：选品很重要，成本控制很重要，销售策略很关键（捆绑销售），畅销品不一定利润最大，店铺选址也必须要考虑等等。
“双十一”购物节活动圆满结束，四年级小朋友不再只是体验者，更多的是以目标为导向的任务践行者，每样商品的售出和购买过程都经过他们的深思熟虑，是真正将数学知识有意识地应用于实际生活。你瞧，他们已经迫不及待地想要结合这次的售买经验去迎接下一场“义卖会”啦！
G2- “Little Buyer”Activity
The beauty of mathematics is so beautiful that it can only be seen from a broad perspective; The beauty of mathematics is beyond words that it can only be experienced by combining with it. The theme of this activity is "I am a little buyer", so that students can feel math, understand math and enjoy math in real life.
In the past month, G2 students learned about the statistics of graphs, the calculation and application of addition, subtraction, multiplication and division in the math class. Based on the RMB knowledge that learned in the first grade, combined with the current mathematical knowledge and ability level of the second grade students, the teachers carefully planned this interesting mathematical activity to let each child experience the role of a family "little buyer". In this activity, the children bought the goods independently throughout the whole process, recorded the unit price of the goods, calculated the total price by themselves, completed the payment and change, and recorded the relevant data in the purchase list in the form of a chart.
Real scenes can stimulate children's desire to explore and think actively, feel the value of mathematics and stimulate their interest in learning mathematics. This activity combines the mathematical knowledge in the classroom with the actual life, which not only strengthens the ability of mathematical calculation and problem solving, but also enables children to assume the responsibility of family and enrich their life experience. You see, from the video, we can see that all the children are enthusiastic and devoted. Don't mention how serious they are!
G3-MINI Double Eleven
To help students raise interest in mathematics and to improve their calculation and application ability, grade three held a "mini double eleven" activity last week.
On Thursday, with the help of the teachers, the students made promotional posters. There are four columns shown on the seller table. The tables include the items, inventory quantity, unit price, and discount available. The names of the posters are also very creative, such as "BIG SALE", "MINI Sundries Club" and "Mickey Tao Tao House". The decoration and format also have their own unique characteristics.
On Friday, the sale of goods officially begins! The two classes cooperated to carry out all activities. Each class set up booths in groups and sold goods individually. To clear the inventory, the students used many different discount methods, such as: buy one get one free, buy two get one free, and get 10 yuan off when they spend over 40 yuan. These discount methods even attracted some teachers to join in.
G4- Double Eleven Festival
During the Double 11 shopping festival, Grade 4 students experienced a series of processes such as questioning, investigation, collection, analysis and application of information, and realized the significance and importance of data in the era of big data. They learned about the forces of the "market" through mechanisms such as supply and demand, price, and competition.
Market Research:
The students conducted small-scale market research through questionnaire surveys, used various charts they learned to analyze the shopping tendencies of customer groups, and summarized the "three magic weapons of sellers": More Profits! Low Cost! Stock appropriately! Finally, the products of popular MAX, cost MIN, profit MAX were screened.
The "Shopping Festival" is in full swing, and little sellers and buyers are showing their housekeeping skills and determined to complete their tasks.
Data analysis:
After the activity, the students conducted data analysis according to the sales and purchase records, compared and analyzed with the market research results, summarized the experience and gained inspiration, such as: product selection, and cost control is very important, sales strategy is very critical (bundled sales), best-selling products are not necessarily the most profitable, store location must also be considered, and so on.
The "Double 11" shopping festival ended successfully, and the G4 children were no longer just experiencers, but more goal-oriented task practitioners, and the sales and purchase process of each product were carefully thought out by them, which is to truly consciously apply mathematical knowledge to real life. They can't wait to combine their sales experience to meet the next "Charity Fair"!