Photomath

From their website, "Photomath is a mobile application described as a "camera calculator", which utilizes a phone's camera to recognize mathematical patterns and to display the solution directly onscreen. It is available for free on Google Android and iOS"

I have utilized this app on my phone and it works well with typed questions and even on my hand written questions.  Not only will it show you a solution but will show you the steps used to get the solution algebraically and graphically.  This works from basic arithmetic through trigonometry and Calculus.  To see the webpage click here.  The downloads can be found for iOS by clicking here  and for Android by clicking here. 

Absolute Value Project

I was at Growing Exponentially and saw this project that had people guess the number of  jelly beans in the jar.  She put the results in  a spread sheet and plotted the difference of the guess from the correct answer.  She then had her students make up their own project.  Check out the site and the student projects by clicking here.