 LOS ANGELES--BUSINESS WIRE--- TEDU CLASSACTION--Glancy Prongay Murray LLP GPM, a leading national shareholder rights law firm, today announced that it has commenced an investigation on behalf of Tarena International, Inc. Tarena or the Company NASDAQ: TEDU investors concerning the Companys possible violations of the federal securities laws. If you suffered a loss on your Tarena investments or would like to inquire about potentially pursuing claims to recover your loss under the federal securit 