I love NRICH, & whilst it remains my number one stop for rich maths puzzles é problems, this website might just be number two. There are literally 100s of puzzle é problems for students to solve. They are beautifully laid out on the page, making them absolutely ideal to project on the board to use as starter activities or extension work. I also suggest using them in the computer room as the website keeps a handy record of students’ progress through a series of puzzles. With the development of students creative thinking é problem solving growing in importance, this website is a must!