If you look over on home ed there are a few reviews of various online UK schools from a NT home edders perspective, but still handy.
For secondary it's now possible to join online US high schools such as Stanford ohs.stanford.edu/ This could turn out to be a better option than intensive exams based on Gove's latest fantasy for anxious kids trying to get the UCAS points for Uni at some point. (kid gets an American High School Dip at the end, including AP subjects if needed). It covers some seriously academic areas such as a decent science curriculum and latin for those frustrated by the dumbed down standard SS offering.
(My kid will never be considered gifted but I could see Stanford suiting the smartest subsection of the Aspie community to a T).
Online programmes:-
The MN favourite Headsprout - both levels.
Mathletics to stay in line with the NC
Maths whizz - again to follow the NC
Plymouth Uni do a whole series of Primary lesson plans based on the NC which can be well handy.
Rays arithmetic - useful for language based maths problems but 18th Century document. (Just haven't found a modern course that hits quite the same spot for problem solving yet).
KHAN ACADEMY - free and to be found on youtube! So many topics, so little time. I totally adore Khan academy, (DS loves science). Lessons from primary to college level so a child can follow an interest to the bitter end.
School House Rock - the songs are on youtube. Great for learning times tables and English Grammar Rules in a fun way.
For Obsessions/topic work/special interests
ISEB - british computer society
coursera.org - college level topics (I do these but good music courses sometimes for beginners).
www.homeschoolshare.com/lapbooking_resources.php - lapbook plans and reading lists
Literature www.amblesideonline.org/ great online library of good classics in pdf format & an adaptable general Primary curriculum based on old school, common sense principles (18th & 19th Century, old school stuff).
civitas.org.uk/shop.php Has some nice History books etc too (these cost though!)
I like the Accelerated learning French course.
She walks off scratching her head and wondering wtf she's doing sending her DS to school when its obvious most of his learning happens at home as that lil lot was off the top her head.