Since you have a great deal of experience with students, you likely have a good sense of how to structure your book. So, start by writing a list of the ten or fifteen most important topics you think should be covered in your math methodology book. Take a look at some other books online (see if any are available for preview on Amazon and look at the table of contents). Get a sense of how many chapters or topics these books cover. If you think these books are good models, choose a similar number of chapters. However, you can possibly differentiate yourself from these other authors by choosing fewer topics and going into more depth or by choosing more topics for broader coverage. In any case, once you decide how many chapters or topics to include, think about how to order the topics. Again, you can use your experience with students here, as you probably know what basic topics need to be covered first in order to make more advanced topics understandable.

After you've developed a structure for your books, begin writing out the first chapter (or perhaps the chapter that you think will come most easily to you in order to get the writing flowing). Since your book will be aimed at students, use the same kind of down-to-earth language and examples that make you such an effective tutor in person. Completing a book can seem daunting, especially if you have many chapters to complete. However, if you can set up a writing schedule that allows you to write each day (or five to six days of the week), you'll be able to map out a timetable for completion. Many writers set a word count goal for the day. Depending on your writing style, this goal may be only 300 words... or maybe several thousand words. Don't worry if your daily word count is on the low end. So long as it's a goal you can realistically meet, you will be able to finish a draft if you're able to write on a regular basis.

Once you've completed that first draft, celebrate! Then begin editing. Editing can be as minor as fixing typos or as major as rewriting a chapter that needs a new approach or structure. If you've given yourself a week or two break between writing and editing, you'll probably have a fresher perspective so that you can see some of the changes that need to be made. You should also look for readers who can give constructive criticism. Perhaps if you work with another tutor, s/he might be able to give you some useful advice. You should also seek out someone who isn't familiar with the subject material, as this inexperienced reader can tell you how effectively you're able to reach your target audience (i.e., people who need help with math). Ideally, your readers will feel comfortable about giving honest feedback and criticism, so you may want to steer clear of family and friends if you feel they'll lack objectivity.

After you have edited thoroughly, you need to decide if you want to publish with a traditional publisher or self-publish. This kind of book would be ideal for self-publishing because you come into contact with your potential audience everyday through your work as a tutor. There are many print-on-demand web sites out there; Lulu.com is probably the most well known. Print-on-demand (POD) sites allow you to upload your book to their web site. Depending on the package you choose, the site will then design a cover, format the book, and print the book when customers come to the site and order it. These sites, so long as they're reputable, are probably a better option than self-publishing companies that require you to buy print copies of your book and then sell them, which can cost a great deal of upfront capital that may or may not be recoverable. You might also be able to sell your book on Amazon through their Kindle site, if you believe you have a market for a Kindle book. Whatever self-publishing option you choose, it is your responsibility to market your book. Besides reaching out to the students you tutor and their friends, you might also set up a web site, if you do not already have one, as well as a facebook page and twitter account created specifically for marketing your book.

Good luck with your endeavor!

Set up a website and offer an e-book on the subject. On the website have a few "free lessons." You get all the profits yourself, sell the book anywhere from $27-$35.

Learn how to write an e-book, get an ISBN number and sell it on Amazon. E-books is the wave of the future.

Funny thing...I do writing tutoring and I write for lobbying.

Here's what you want to do, and I learned it from my Freshman English teacher over 20 years ago in college: freewriting. Just write it, no punctuation, no grammar, nothing if you don't want. You can always clean it up. But the first step is to get something onto that page. We were required to do three freewritings a week, 15 minutes each. He said he wouldn't read it but he'd look to see if we had done the required amount of writing. I was freelance publishing and writing already, and while nowadays most colleges and universities assign students email addresses, back in 1988, almost no one had one. But I didn't have a computer--I used the 24-hour computer labs enough for writing that I just filled out the form one day. At the time I typed about 105wpm.

So Spring Semester, 1989, I struck a deal: he could read them, IF I could email them to him. I dragged him to get an email address--and he often got far more than 15, 30, 45 or even 60 minutes. I never timed it but it was usually at least a full page. (I was having major girlfriend issues at the time.) I still have the entire folder of them he gave back at the end of the semester.

Around March 31, he wrote a midterm evaluation letter. About 3 pages. It said something along the lines of, "Man, if you would do your assignments like you do your freewritings, I'd hand you an 'A' on a f***ing silver platter." So I began to write whatever came to me.

The platter I received in May, 1989 still hasn't tarnished.

As for production of the book--don't., unless you want tons on hand. Do it through lulu.com--it's pretty much a turnkey on-demand self-publishing site. You set the price, they take a portion as a fee and you're paid by PayPal. Poke around lulu.com for more info & to see how it works.

You might even consider setting up a tutoring line at ether.com. Case of a tutor in point:
http://www.ether.com/CallButton/Gary-Allen/7232798.aspx
Same thing--paid by PayPal, and you can even start a call for free, schedule calls, and send email that people need to pay to see--so if your book is a pdf, that would work.

Good luck.