The Word 'ADVICE'

I have been teaching polytechnic students part-time for the last 18 months and the word ADVICE has often come into contention where its usage is concerned. At the end of the day, my students have to present their work to the class and it usually involves coming up with solutions or advice. The heading 'Advices to So & So ' keeps popping up and I have had to correct my students several times. Although I am not their English teacher and I only have to teach them Enterprise Skills, it really disturbs me that such fundamental grammatical errors are allowed to be made at their level. Has effective communication dispensed with proper grammar? According to them and their online dictionary, 'Advices' is the plural of Advice. SINCE WHEN pray tell?? Where I was schooled, ADVICE is a (collective) noun and ADVISE is a verb. You 1) Give/receive a piece of advice to/from so & so 2) Give/receive some advice to/from so & so 3) Advise so & so. I asked a group of students in my class last week if their English teachers in school ever pointed out such errors to them and made sure they were subsequently corrected and not repeated. The response I got from one outspoken boy was, "Mr Foo, their English is just as bad as ours lah, how they know how to correct?".