Learning computer programming for students of the age of 14-18 is difficult and requires endurance and engagement. Being familiar with the syntax of a computer language and writing programs in it are challenges for youngsters, not to mention that understanding algorithms is also a big challenge. To help students in the learning process, teachers need to increase their engagement and motivation by giving them interesting and entertaining tasks. Implementing different image processing algoritms can be very efficient for enhancing their programming skills, since by running their programs on real pictures taken by cameras, they can examine the effects of these programs. This article carefully selects and introduces image processing algorithms that are based on basic computer algorithms and are understandable for secondary school students. It also shows how to apply them in programming classes and how to provide the discovery learning for students.
Greece these last 15 years has developed and implemented a large-scale system for the integration of digital technologies in education and more specifically in the teaching practice. "Large-scale" means that the whole program concerns all Greek education system. A very important part of this nationwide project is the training of teachers program that involves practically all Greek teachers - so far more than 120,000 teachers have been involved and soon they will be involved all of them (approximately 150.000). In this paper we present a summary of this plan. The monitoring of this project at national level, almost from its very beginning, gave to us the opportunity of collecting a large volume of raw information and data of both quantitative and qualitative nature.
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