But make the subject search box the most prominent feature.
Auto complete structure:
As user starts to type list of suggestions come up below
Tree structure used during signup should apply to search results too i.e. if user searches for Maths all sub-categories and sub-sub-categories should show up i.e. Algebra as well as Linear Algebra
Similarly if someone searches for Algebra then all of the tutors that teach any of the sub-sub-categories should show up i.e. If the user searches for Algebra then Linear Algebra tutors should show up as well as Pre-algebra tutors etc.
If a sub-sub-category is chosen only tutors specifically signed up for that subject should show up in search results
Keep search parameters: Price and Availability
But make the subject search box the most prominent feature.
Auto complete structure: