A ceramic steel chalkboard with a raw aluminum frame. The materiality of the frame is emphasized through the unfinished aluminium with colour irregularities and markings. Patinated even more over time and combined with the dustiness of the colourful chalk board, it gives the product life on the wall. The chalk pens can be stored in the frame. MATHEMATICS is available in one size with three characteristic chalk board colours. Designed by HALLEROED.