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. 

Cardboard Regatta and Calculus

The students at Waubonsie Valley High used their Calculus III skills and some creativity in their schools pool  to make their cardboard boats.  To see the article click here.  I also posted in March 2014 another article about cardboard canoes.  To see that article click here. 

Space Math @ NASA

From their website, "SpaceMath@NASA introduces students to the use of mathematics in todays scientific discoveries. Through press releases and other articles, we explore how many kinds of mathematics skills come together in exploring the universe

The problem sheets that they have are real world problems and include answer sheets.  I peaked at the Calculus section and some of the problems might be a tad advanced for some students but their were definitely some good sheets there.  For example "Rotation Velocity of a Galaxy #106".  This would make a nice sheet in Grade 12 Functions or in Calculus.  

To see their website click here.