Reading audio By VOAOctober 23, 2013抱歉,51VOA编辑抱恙,今日慢速不提供文本。 Category Education Report Related reading: Improve Your English by Practicing Effectively Student Series: Thanksgiving in the US More US Schools Offering International Baccalaureate Programs School Gardening Becomes More Popular in US Mental Health Experts, Educators Call for End to School Shooter Drills