What might be termed as a “traditional” approach (usually using textbooks / workbooks) would appear to be favoured by many American homeschoolers, particularly Christians.
Although there are lots of textbook and workbook-based curricula available in the US, most UK traditional home educators use workbooks like CGP.
If this approach appeals to you, WHSmith have a good selection of workbooks to choose from.
Most parents new to home education seem to be looking for this kind of structured programme, perhaps because it is reassuring to be able to have a kind of structure to fall back on.
(Planning your own programme or allowing the children to take control of their own learning can seem a very daunting prospect!)
Many of the British home educators I have spoken to who started off with a formal approach gradually moved to a less formal approach.