Hi Althea,
Before saving, you should save your worksheet,
so that it gets saved with it's normal .xls file extension, and then...
Use either
File, Save As ...
or the slightly more direct:
File, Save As Webpage
You mentioned Save as type has at the bottom -- save as addin,
that is Not what you want, you want a choice next to top of the dropdown.
specifically you want "Web Page (*.htm; *.html)
which is near the top.
Unless you want to convert the entire workbook, change the
option to "Selection: Sheet"
If you prefer to do your own HTML without round-tripping, without
specific pointsizes, without specified column widths so that HTML
can do it's own thing and you are comfortable working with HTML
coding see
http://www.mvps.org/dmcritchie/excel/xl2html.htm
The coding generated by this and plopped into the code source for Front
Page can be one tenth the size of plopping the Excel selection
directly into Front Page with all of its round-tripping etc,