I have launched a new trial service for mathematics questions with which you would like help. You can email your question to firstname.lastname@example.org or post a blog entry. I will provide an answer in the blog or start a set of comments with other students. If you want to post directly you can sign in as a student using a guest student ID. I will provide the ID and password if you email me at email@example.com or you may prefer to request your own ID which I will be happy to provide.
In either case your question will appear in the blog and I will be alerted that you have posted a question so that I can reply promptly. I have provided an example question and answer in the "other" category but I encourage questions at all levels – particularly at GCSE and A level.