A mathematics trail (also maths trail or math trail) is a walk where you can discover and solve mathematical problems on real objects. Math Trails are a part of outdoor education. They can be used in school context to offer a reallife experience beside of textbooks. Nevertheless, a math trail requires good preparation and a solid postprocessing in the classroom.

Many examples for tasks coming from geometrical background. It is obvious to ask for the height of building or a statue, as well as asking for the volume of a pond. But there is more to discover, combinatorical problems can be solved, functions can be discovered or even statistics are possible.

Math Trails have been a thing since the 1980s. The project is about bringing this outdoor activity together with the possibility modern mobile devices are offering. A smartphone can display maps, photos of objects, it allows automatic feedback on solutions the users gives as input.

## Benefits

First of all, math trails are fun. They started as a way to popularise mathematics in the 80s and 90s for everyone, students, parents and interessted citizens. Also people move around outside when doing a math trail. They get into a better connection to their environment and start to look through the math glasses.

Going on a math trail means to have walk outside and discover not the mathematics, but also the surroundings. Students start to move and to think about mathematical problems, related to real objects.

## MathCityMap

One way to do this is the MathCityMap Project (www.mathcitymap.eu). It is a math trail management system, where users can create tasks and trails and share them amongst themselves or with the public.