The first tool I explored was the math game site called Manga High. This site has a wide variety of math topics and covers a wide range of levels so it can meet the needs of students who are needing a challenge as well as those who are struggling and need more practice. Students can earn points and badges as they progress through the quizzes and they can even compete against other schools. It is very user friendly and provides immediate feedback to the student. If a question is missed the student can go back and review it to see a detailed explanation of how to solve the problem for the correct answer. This is a great tool that can be used by students at home as a part of homework or used in the classroom. It helps with differentiation because students can progress at their own pace and get challenges that are tailored to what they have already mastered.
Liu, M., Scordino, R., Geurtz, R., Navarrete, C., Ko, Y. & Lim, M. (2014). A look at research on mobile learning in K-12 education from 2007 to the present. Journal of Research on Technology in Education 46(4), 325-372.
Solomon, G., & Schrum, L. (2014). Web 2.0: How-to for educators (2nd ed.). Eugene, OR: International Society for Technology in Education.