LessonPlans.com - Lesson plans for teachers » wildlife https://www.lessonplans.com LessonPlans.com - Lesson plans for teachers Thu, 16 Oct 2025 20:40:47 +0000 http://wordpress.org/?v=2.8.6 en hourly 1 The first U.S. zoo opened in Philadelphia in 1874. https://www.lessonplans.com/the-first-u-s-zoo-opened-in-philadelphia-in-1874/ https://www.lessonplans.com/the-first-u-s-zoo-opened-in-philadelphia-in-1874/#comments Fri, 20 Aug 2010 14:27:48 +0000 admin http://www.lessonplans.com/?p=2115
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