Develop the SFK Number E-Book for number recognition skills of number1 to 10 for five- year-olds children

The aim of this study is to develop the SFK Number E-Book for number recognition skills of number1 to 10 for five- year-olds children. The study was conducted using a quantitative approach, through questionnaire surveys. Participants of this study consist of preschool and kindergarten teachers. The data in this study was collected using a survey method that consists of needs analysis, expert effectiveness and usability surveys. The findings of the study for the first question found that the development of SFK Number E-Book needs to emphasize the usability and suitability aspects of the activity to help children recognize numbers 1 to 10. Based on the results of needs analysis, digitally built and interactive teaching materials are essential to attract the interest and attention of children. The findings for the second question suggests that the development process of SFK Number E-Book should involve activities that can improve the cognitive and fine motor skills of children. Activities such as scratching, grading, and matching numbers with objects were found to be effective in helping children understand and recognize numbers in sequence. For the third question, focus on the usability level of the SFK Number E-Book. The E-book that was analyzed through a usability survey, showed that the majority of respondents strongly agreed that this ebook is easy to use and suitable for five-year-olds children. The scale structure and interactive content of the SFK Number E- Book are flexible and effective as a teaching tool in a variety of learning situations. It is hoped that this study will provide exposure and reference to preschool teachers and kindergartens in applying digital teaching materials to enhance the children's numerical skills.