另一个需要考虑的重要因素是Ruby的数学能力。在第一个活动中，Ruby知道如何支付她在超市买的东西。她知道从超市拿走的东西都应该立即付款。这种做法也体现在她去真正的超市的路上。这种数学能力也许不是独一无二的，但从一个小孩子的角度来看却很有趣。Ruby在数学概念和学习方面有很大优势，因为她知道数字和数学思想。的确，要想精通数学，孩子们必须知道的比内容多。他们必须能够交流知识，将这些知识与其他数学思想和其他学科领域联系起来，代表他们的理解，在解决问题和推理时使用这些知识”(Copley, 2010, p.29)。从这个意义上说，数学不仅应该在课堂上练习，也应该在日常生活中练习(Peters & Rameka, 2010)。在Ruby的例子中，这些想法被理解是因为她在现实世界中使用了她的数学知识。她用数学在超市里买东西——不仅用金钱，还用排序。同样值得注意的是，孩子们需要“表现出对数学问题的灵活性和持久性的思考能力”(Copley, 2010，第29页)。这种想法出现在Ruby的第一个活动中。她展示了通过寻找更多资源来解决问题的能力。她不只是完成布丁;相反，她找到了其他的东西使布丁在味道、气味和外观上更好。这些想法展示了Ruby是如何在日常生活中应用数学的。
Another important to consider is Ruby's mathematical abilities. In the first activity, Ruby knows how to pay for the things she buys to the supermarket. She is aware that everything taken from the supermarket should be paid immediately. This practice is also shown in her journey to the real supermarket. This mathematic ability may not be unique, but interesting to see from a young child. Ruby can have a significant advantage in mathematical concepts and learning because she is aware of numbers and mathematical ideas. It is true that "to be good or proficient at mathematics, children must know more than the content. They must be able to communicate the knowledge, connect that knowledge to other mathematical ideas and to other subject areas, represent their understanding, use that knowledge as they solve problems and reason" (Copley, 2010, p.29). From this sense, it can be said that mathematics should not only be practiced inside the classroom, but also in everyday life (Peters & Rameka, 2010). In Ruby's case, these ideas are perceived because she uses her mathematical knowledge in the real world. She uses math to buy things in the supermarket-not only in money, but also sequencing. It is also important to note that children need to "demonstrate a disposition that think flexibility and with persistence about mathematic to solve problems" (Copley, 2010, p.29). This thought occurs in Ruby in the first activity. She demonstrates the ability to solve problems by finding more resources. She does not simply complete the pudding; instead, she finds other things to make the pudding better in taste, smell, and appearance. These thoughts show how Ruby is able to apply mathematics in everyday life.