Some beginner videos that are definitely going to help you with your writing.
https://www.youtube.com/watch?v=tTMV8JRCg44
https://www.youtube.com/watch?v=wIY6DK8IWjI

supa dupa linx for A1!!!!!!!!!
http://www.bbc.co.uk/schools/websites/4_11/site/literacy.shtml

http://www.bbc.co.uk/schools/ks1bitesize/literacy/

http://www.bbc.co.uk/cbbc/games/#game=bluepetercomiccreator

Very amusing game including A1 grammar rules and involving ears, eyes and brains.

http://www.bbc.co.uk/schools/spellits/home_y6flash.shtml

Sentence construction, finding words within words, prefixes and suffixes and many other games. Have a good look around.
http://www.literacy-resources.co.uk/onlineEvals/sent1.html
http://www.literacy-resources.co.uk/onlineEvals/PrefixWheel.html
http://www.literacy-resources.co.uk/