Part 1: Game descriptions -- Chapter 1 Design of the game “Dudeman & Sidegirl: Operation clean world”, a numerical magnitude processing training -- Chapter 2 Description of the educational math game ‘Monkey Tales: the museum of Anything’ -- Chapter 3 Number Navigation Game (NNG): Design principles and game description -- Chapter 4 ‘Zeldenrust’: a mathematical game-based learning environment for prevocational students -- Chapter 5 Applying motivation theory to the design of game-based learning environments -- Chapter 6 DIESEL-X: A game-based tool for early risk detection of dyslexia in preschoolers -- Part 2: Empirical studies on serious games -- Chapter 7 Performance in educational math games: Is it a question of math knowledge? -- Chapter 8 Integration in the curriculum as a factor in math-game effectiveness -- Chapter 9 Developing adaptive number knowledge with the Number Navigation game-based learning environment -- Chapter 10 Number Navigation Game experience and motivational effects -- Chapter 11 The role of curiosity-triggering events in game-based learning for mathematics -- Chapter 12 Evaluating game-based learning environments for enhancing motivation in mathematics -- Chapter 13 Formal and informal learning environments: Using games to support early numeracy -- Index.