一个课程编排工具帮助教育工作者在网站上编写教案，这个主意在于让会员提供很多方法，这些方法代表着最好方法。
A curriculum-building tool helps educators create lesson plans on the site. The idea is for members to donate resources that represent best practices.
杂志拥有这些照片的永久非排他性版权，他们将图片保存在网站上，直到创作者主动撤销。
The magazines own permanent nonexclusive rights to the photos, and they remain on the Web site until the creator pulls them down.
应用推荐