【悲報】中学生「紙教科書重い」→電子教科書にした結果 https://safepop.news/%e3%80%90%e6%82%b2%e5%a0%b1%e3%80%91%e4%b8%ad%e5%ad%a6%e7%94%9f%e3%80%8c%e7%b4%99%e6%95%99%e7%a7%91%e6%9b%b8%e9%87%8d%e3%81%84%e3%80%8d%e2%86%92%e9%9b%bb%e5%ad%90%e6%95%99%e7%a7%91%e6%9b%b8%e3%81%ab/