Abstract
Twenty four Year 2 children were presented with realistic models of either cricket or tiling and asked
firstly, to indicate which of a set of 10 abstract angle models could represent the path of the ball or the
corners of the tiles, and secondly, to draw the paths or corners. Responses were analysed to indicate
obstacles to abstracting the angle concept. In the cricket context, children needed to conceptualise the
path of an object as a straight line segment and then to link the segments to the sequence of actions. In
the corners context, children needed to abstract the two ides and ignore the shape at the point; ideas of
size were apparently abstracted concurrently. Similar investigations in further contexts promise to
uncover other difficulties which children face in abstracting the angle concept.
MICHAEL MITCHELMORE
ABSTRACTING THE ANGLE CONCEPT