The GLOSS certificates provide documentation of the hard work you put into maintaining and improving your language proficiency. 

GLOSS lessons are a valuable tool in helping you maintain and improve your overall language proficiency. To derive the greatest benefit from a lesson, the GLOSS developers team strongly advises the learner to complete all activities and thoroughly review the feedback and notes. 

It is recommended that you take advantage of the Source, Glossary, and additional Resources. However, credit toward the Certificate is based upon working through the lesson activities.