A site where there are numerous activities that relate Maths to real/authentic problem. I have read some of these problems and they are interesting to incorporate in lessons.

Below is their Maths philosophy and why they set up the site.

We’ve created Yummy Math to provide teachers with an easy way to bring real-life into their math classrooms. It is our belief that when math is explored in contexts that are familiar and of interest to students, students will be more engaged to do math, reason, think critically, question and communicate. Our activities are written to correspond with the NCTM Process Standards and the CCSS Standards for Mathematical Practice. We are in the process of adding CCSS correlation to each of our activities. We’ve kept the site updated with multiple activities per week since March 2010 at no charge to teachers. If you have used our material, please consider making a donation to help us continue bringing meaningful mathematics to you and your students. Thank you.