Books, No Pronunciation scores, Cheap, ★
These are supplementary material in 6 languages ($10). There is no audio. They explain grammar clearly and offer learning advice, with useful exercises.
Like: Facebook, Twitter,
Google+1, Renren, Weibo,
Baidu Like, Baidu Tieba,
Dates are assigned arbitrarily to sort the articles. Most articles have been updated more recently.
Reviews of Courses