This is an incredibly useful search engines for teachers to use with students at every level. In fact it is more than once search engine, as you can see in this screenshot:

Sweet search has been developed carefully:  “It searches only the 35,000 Web sites that our staff of research experts and librarians and teachers have evaluated and approved when creating the content on findingDulcinea. We constantly evaluate our search results and “fine-tune” them”.

Their blog post explains even more:

SweetSearch is the product of 100,000+ hours of research that went into creating findingDulcinea’s 700+ Web Guides and thousands of articles. This content links to tens of thousands of Web sites that have been evaluated and deemed reliable by our research experts and librarian and teacher consultants (for a bevy of reviews of findingDulcinea and SweetSearch from top educators, see our media kit; or get a widget for SweetSearch, so you can embed it on your school Web site.).

For younger learners, we’ve recently introduced a beta version of SweetSearch4Me, which is the only search engine that prominently ranks high quality Websites created for elementary (primary) school students, and mixes them with accessible primary source sites. Please send feedback on SweetSearch4Me to sweetsearch@dulcineamedia.com so we can fully launch it with your input in September.

Sweet search also has a terrific page for school librarians.

This page has information on:

• research guides
• tips for better research
• news of the day
• improving research habits and more.

This site comes highly recommended from educators globally. However, as always, check it out first to see if it suits your needs.