ThatQuiz for Teachers - Great source for targeted instruction

Last week during professional development teachers were asked to share new technology they were using since our building became a 1 to 1 school.  One of the math teachers shared ThatQuiz for Teachers.  She stated that she was using it for assessment in her upper level math classes.  I was happy to discover that the site included all levels of math and allowed for targeted instruction.  The site allows the teacher to determine whether the assessment wil be graded or practice and whether the correct answers will be provided immediately after an incorrect response.  For example, I set up a practice test that focuses on distributive property and like terms for a student who struggles with these two concepts.   The difficulty levels vary greatly and there are test available in other subjects as well as the ability to create your own.