Choosito is a neat search engine for students and teachers to use to find websites based on reading level. It also includes a number of filtering options that let teachers do things like eliminate search results from Wikipedia or message board communities. See how it works here.
Quick Key is a popular app that lets teachers quickly score formative assessments. Teachers using Quick Key grade paper-based quizzes by scanning the paper with the free Quick Key app. But teachers can also use Quick Key to create online assessments that are automatically scored too. Get more details here.
Earlier this week Choosito and Quick Key announced a partnership in which teachers who use Quick Key to score formative assessments will be able to quickly find educational resource suggestions based on assessment scores. The idea is that once Quick Key helps teachers identify a student's area of weakness, Choosito will use that data to make resource suggestions. In the announcement Quick Key and Choosito promised that student data is kept anonymous between the two services.
Quick Key and Choosito are not the first companies to do something like this. MasteryConnect and Otus offer somewhat similar services. In all cases, the final determination of whether or not the service is useful to teachers and students is made by the teachers and students who utilize the suggested resources.
Disclosure: Quick Key is currently an advertiser on FreeTech4Teachers.com