Caldecott medal winners have been recognized as best picture books, and they become one of the most predominantly selected literary works for children. Impacts they have on children’s emotional, social, and linguistic development are well-recognized in various areas such as literacy, literature, and sociology. As educational philosophies embedded in Caldecott medal winners may contribute to their ‘didactic’, sociocultural, and linguistic impacts, this study explores what educational philosophies are embodied in 85 Caldecott medal winners from 1938 to 2022. It classifies them in terms of five major educational philosophies (progressivism, essentialism, perennialism, existentialism, and postmodernism including multiculturalism, feminism, ecology, and metafictive devices). Finally, it traces their prevailing trends from the chronological order in which they are introduced. The findings of this study are as follows: 1) Some educational philosophies such as essentialism and multiculturalism have appeared most frequently while perennialism and progressivism are no longer prevalent modes presented in Caldecott winners; 2) The changes in overall chronological flows of educational philosophies are made from essentialism to postmodernism, especially promoting picture books of metafictive devices. This study assumes that using appropriate Caldecott winners that can meet children’s different educational needs would better result in their emotional, sociocultural, and linguistic development.

The Animal and Plant Quarantine Agency conducts a targeted sampling plan and analysis for veterinary drugs within the country every year. Target compounds included tetrachlorvinphos as an organophosphate, diminazene as an anti-infective medication, ketoprofen as a nonsteroidal anti-inflammatory drug, triclabendazole and clorsulon as flukicides in 2022. These compounds were not included in National Residues Program (NRP), despite their high sales ranking. A total of 94 bovine muscle samples and 20 equine muscle samples were collected from various locations across the country. The analysis of target compounds in muscle was performed using LC-MS/MS coupled with Food code 8.3.1 revised in 2022. A 2 g sample of muscle tissue was extracted using a water: acetonitrile (1:4, v/v) solution, then cleaned up with C18 and hexane saturated with acetonitrile. Compounds were separated with C18 column and mobile phases consisted of 0.1% formic acid in water (A) and 0.1% formic acid in acetonitrile (B). All analytes exhibited good linearity with correlation coefficients (R2) higher than 0.992. The limit of quantification (LOQ) of these compounds ranged from 0.21 to 2.79 μg/kg except for diminazene (3.85~6.86 μg/kg). The average recoveries of these analytes were 89.45~129.13% in muscle at spiked level of 10 or 20 μg/kg. Relative standard deviations (%) (intra-day and inter-day) were lower than 20% for all target compounds, except for diminazene and triclabendazole, whose intra-day RSD % was slightly higher than 20% in equine muscle. Testing confirmed that all 94 bovine and 20 equine muscle samples from 9 provinces were free from residues of veterinary drugs. Monitoring of compounds not included in the NRP should continue to ensure consumer health and food safety.