According to the search results provided, the following conclusions could be drawn: the frequency of replacement of the fly paper should be determined according to the environment, season, and the number of mosquitoes and flies on the fly paper. When there are more flies in spring and summer, it is recommended to change the fly paper every two weeks, and when there are fewer flies in autumn and winter, it can be changed once a month. In addition, the replacement of the fly-killing paper should also be based on the use of the fly-killing paper. If the glue or pesticide has been exhausted, or there are too many dead insects on the fly-killing paper, it should also be replaced in time. The specific replacement standards should also follow the manufacturer's recommendations.
Maths fiction books can make abstract maths concepts more concrete. For example, in 'Flatland', the description of the 2D world helps in visualizing geometric shapes better. They also create interest. When reading about a character using maths to solve a problem in a story, like in 'The Number Devil', it makes maths seem less intimidating and more like an adventure.
The story of Euclid is also a great maths success. He wrote 'Elements', which was a comprehensive compilation of geometrical knowledge. His work established the foundation of geometry as we know it. For over two thousand years, students have been learning from 'Elements', and it has been the basis for many further developments in mathematics and related fields like architecture and engineering.
One success story could be a student who was initially struggling with algebra but through dedicated practice and the help of a great tutor, mastered it and went on to win a math competition. Another might be a person who overcame their math phobia and was able to complete a degree in engineering which requires a lot of math skills. There are also those who, by mastering math, were able to start their own successful financial consulting businesses as math is crucial in finance.
One challenge is finding the right stories that fit the maths concepts well. Not all stories can be easily adapted to teach maths. Another is that some students might focus too much on the story and miss the maths part.
It can be very effective. Stories can make abstract maths concepts more concrete and relatable for students. For example, using a story about sharing candies among friends to teach division. It engages students' interest and helps them remember better.