小山市公式ホームページ お知らせ https://www.city.oyama.tochigi.jp/ 小山市のお知らせです ja php PTA総会資料 https://www.city.oyama.tochigi.jp/school/elementary-school/kayabashi/news/page010876.html https://www.city.oyama.tochigi.jp/school/elementary-school/kayabashi/news/page010876.html Wed, 08 Apr 2026 00:00:00 +0900 最近の学校行事のようす https://www.city.oyama.tochigi.jp/school/elementary-school/kayabashi/news/page010199.html https://www.city.oyama.tochigi.jp/school/elementary-school/kayabashi/news/page010199.html Tue, 23 Dec 2025 00:00:00 +0900