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New Ideas for Old Problems
Ballroom C
Monday, 10:30, 1 hour 30 minutes | 7 | · | 8 | · | 9 | · | 10 | · | 11 | · | 12 | · | 13 | · | 14 | · | 15 | · | 16 | · | 17 | · | 18 | · | 19 | · | 20 | · | 21 |
- "Objects First, Interfaces Next" or Interfaces before Inheritance
- Axel Schmolitzky
University of Hamburg
schmolitzky@acm.org
Objects first is a pedagogy that tries to introduce the core concepts
of object-oriented programming—classes, objects, and methods—as
early as possible in a programming course, even before variables,
types, assignments and control structures are explicitly introduced.
The concept of a named interface is typically introduced at a much
later stage, usually in connection with inheritance, polymorphism,
and abstract classes. In this paper we point out that interfaces as
a language mechanism can be introduced much earlier, even before
inheritance. This way the concept of an explicit class interface can
be decoupled from the more complicated issues of inheritance and
subtype-polymorphism.
- Ancestor Worship in CS1: On the Primacy of Arrays
- Phil Ventura
State University of West Georgia
pventura@westga.edu
Christopher Egert
University at Buffalo, SUNY
egert@cse.buffalo.edu
Adrienne Decker
University at Buffalo, SUNY
adrienne@cse.buffalo.edu
History has given us the array as the fundamental data structure to
present to students within the CS1 curriculum. However, with the
recent growth in popularity of object-oriented languages for CS1
(C++, Java, C#), and with that, the acceptance of the Objects-First
or Objects-Early approach to teaching CS1, it becomes imperative
that we re-evaluate our long-held beliefs about what is appropriate
to teach. It is our position that the first data structure that
students are exposed to should not be arrays, but rather some other
form of collection. We will give some examples of how to use
java.util.HashMap and some of the other Java Collections classes
in substitution of arrays. We also present data concerning the
academic performance of students using arrays versus those using
Java Collections for CS1 lab exercises.
- greenfoot: Combining Object Visualisation with Interaction
- Michael Kölling
University of Southern Denmark
mik@mip.sdu.dk
Poul Henriksen
University of Southern Denmark
polle@mip.sdu.dk
The introduction of programming education with object-oriented
languages slowly migrates down the curriculum and is now often
introduced at the high school level. This migration requires
teaching tools that are adequate for the intended target audience.
In this paper, we present a new tool, named greenfoot, for teaching
object-oriented programming aimed at students at or below college
level, with special emphasis of supporting school age learners.
Greenfoot was designed by analysing and combining the most beneficial
aspects of several existing tools. It aims at combining the
simplicity and visual appeal of microworlds with much of the
flexibility and interaction of BlueJ. To achieve its goals of
providing a suitable learners? environment, greenfoot provides
a meta-framework that allows easy creation of different,
significantly varied microworlds.
- Activity Session: Predicting the Future of OO Teaching by Inventing It
- Details to follow...
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