Im Folgenden wird einheitlich von Dezimalbrüchen gesprochen und nicht (wie in einigen
Lehrplänen und Schulbüchern) von Dezimalzahlen. Der Begriff „Bruchzahlen “wird …

Arithmetic is still hugely important in many aspects of modern life, but our personal attitudes
to it differ greatly. Many people struggle with the basic principles of arithmetic, whilst others …

We describe the main principles of the framework theory approach to conceptual change
and briefly report on the results of a text comprehension study that investigated some of the …

Abstract [Correction Notice: An Erratum for this article was reported in Vol 107 (3) of Journal
of Educational Psychology (see record 2015-09017-001). There were two rounding errors in …

It was argued recently that number line based training supports the development of
conceptual rational number knowledge. To test this hypothesis, we evaluated training effects …

Two experiments investigated the whole number bias in the representation of fraction
magnitudes with adults. A fraction magnitude comparison task was used where half of the …

When school students compare the numerical values of fractions, they have frequently been
found to be biased by the natural numbers involved (eg, to believe that 1/4> 1/3 because 4> …

Understanding rational numbers is a complex task for primary and secondary school
students. Previous research has shown that a possible reason is students' tendency to apply …

Even though digital learning games have become common in education, relatively little is
known about the usefulness of game-based assessment. This paper aims to explore if a …

Given the important role played by students' spatial reasoning skills, in this paper we
analyse how students use these skills to solve problems involving 2D representations of 3D …