Marc Späni; Michael Marrak; Stephen Kotowych; Thomas Ziegler; Norbert Stöbe; Karsten Kruschel; Thomas Adam Sieber; Hammer Amrun Verlag&Buchhandel (2015) Pehmeäkantinen kirja
Dean Ritz; Franz Ablinger; Thomas Brandstetter; Per Cromwell; Kero Fichter; Jasmin Hagendorfer; Lars Oscar Lyberg; Marrak Verlag fur moderne Kunst GmbH (2021) Pehmeäkantinen kirja
Written by a hugely experienced "Maths in Action" author team. All material and exercises throughout the books are clearly identified with a 5-14 level indicator. Identical chapter titles and introductions enable mixed ability teaching. It includes extra material necessary for progression to the next level. Mental and non-calculator work clearly is indicated throughout.