Since when? I've always used them and teachers I know do too.
Drop the E add ING. etc.
My kids (class kids) know the difference between vowels and consonants before they go to Year 1.
Grammar IS in the primary school curriculum. It doesn't need to be reintroduced.
No offense intended so hope none was taken.
I can only go by my 6 & 10 year old grandsons that I tutor, plus some other primary kids I know from other schools whom I've asked questions of. (I have asked around to check what goes on in different schools). The 10 year old vaguely remembers a rhyme about nouns are the names of things and both grandkids sort of remember vowels and consonants being mentioned, but not reinforced. Answers from kids from other schools are similar.
I distinctly remember hearing a news item earlier this year about grammar being re-introduced. I remember talking to my sister about it (she's worked in schools for over 20 years but isn't a teacher), and she'd heard it too and wondered, like me, who would teach it. I also recently chatted with a reading recovery teacher about it and she said similar things to me and my sister. My own daughter (a high school English teacher) says she doesn't have to teach grammar, and has never been taught parts of speech e.g. adjectival and adverbial phrases etc. herself and she has a degree in Communications as well as teaching.
I've tried googling to see what I can find and have come up with the following - http://www.abc.net.au/news/stories/2008/10/17/2393989.htm
http://www.theaustralian.com.au/news/students-want-more-english-grammar/story-e6frg6no-1111117494048
http://www.quadrant.org.au/magazine/issue/2008/12/chairman-rudd-s-education-revolution
Maybe the suggestion was to teach more grammar than what is being covered currently?