The former learned multiplication using TriApp and the later learned it using the multiplication table (repeated additions).
To evaluate the effectiveness of the TriApp, two preschool children groups were examined in 10 days. There is a test and competition section in which the child receives points by giving the correct answers, which increases the children's desire to learn. With TriApp, in addition to multiplication, children can also learn division. By repeating and memorizing this group, if any of the numbers are not displayed, the child can guess the missed number.
This application uses the Triple Multiplication method in which three numbers (including two numbers, and the product of multiplication of these two numbers) are considered as a group. In this paper, an Android application called Triangular App (TriApp) was designed for teaching multiplication to preschool children. Moreover, technology-based infrastructure for the use of distance education is developing rapidly. Due to the difficult educational condition caused by the COVID-19 pandemic, the design and development of mobile phone apps and technologies for teaching and learning are being more considered.
