https://minssam.com/en/blog MINSSAM.COM — 민쌤의 생각과 도구 노트 en-US address@yoursite.com (민쌤 (MINSSAM)) address@yoursite.com (민쌤 (MINSSAM)) Sun, 29 Mar 2026 00:00:00 GMT https://minssam.com/en/blog/bloom-two-sigma-problem-review https://minssam.com/en/blog/bloom-two-sigma-problem-review In 1984, Benjamin Bloom demonstrated empirically that one-on-one tutoring produces achievement two standard deviations higher than group instruction. Forty years later, is AI tutoring solving this once-"impossible" problem? Sun, 29 Mar 2026 00:00:00 GMT address@yoursite.com (민쌤 (MINSSAM)) education-researchbloom2-sigmaAI-educationpersonalized-learningpaper-review https://minssam.com/en/blog/screen-time-learning-pisa-paradox https://minssam.com/en/blog/screen-time-learning-pisa-paradox According to OECD PISA research, digital device distractions in the classroom cost students the equivalent of three-quarters of a year's worth of learning. Smartphones may be the key driver behind the global PISA score decline since 2009. Sat, 28 Mar 2026 00:00:00 GMT address@yoursite.com (민쌤 (MINSSAM)) PISAOECDscreen-timesmartphones-educationdigital-devicesacademic-achievementeducation-research