This activity is an introduction to writing programs that can handle errors. It also helps students to understand number bases, by guiding them through the writing of a ‘base converter’ program.

Suitable for students throughout secondary computing, including those studying at an advanced level, this exercise introduces the Heap Sort and explores why it is more efficient than the Bubble Sort in another Scratch Patch article. Students learn about tree data structures, including the correct terminology for...

This game-writing activity using Scratch will bring back youthful memories for some! It provides...

This practical guide to creating a simple game is aimed at those new to programming with Scratch...

Combining some fundamental physics with trigonometry and computer programming, this guide helps students to create a simulation of the projectile motion of a cannon ball. The concepts are all briefly explained, and the program introduces some clever mathematics as well as game elements, such as collision detection...

This project, exploring basic encryption, is a useful introduction to data security as well as iterating through strings to manipulate them. The program create a ‘substitution cipher’, one of the most basic forms of encryption. It also demonstrates that, for more complex chained commands, Scratch becomes rather...

This visual mathematics project focuses on the beautiful images known as Julia Sets (named after French mathematician Gaston Julia). Students use a repeated iterations to explore the world of complex numbers, writing and amending a relatively complicated Scratch program. 

Edexcel’s GCSE Astronomy syllabus provides an opportunity for students to develop their understanding and enthusiasm for astronomy, as well as to complement and extend the reach of their study of Key Stage Four science, technology, engineering and mathematics (STEM) subjects.

This article from School Science...

A Catalyst article about Socotra, a small archipelago of four islands in the Indian Ocean off the horn of Africa, belonging to the Republic of Yemen. The islands are becoming famous for their range of animal and plant species and for their use as a natural 'laboratory' where ideas about evolution can be tested. The...

The Solar Spark educational resources are produced by the SUPERGEN Excitonic Solar Cells Consortium. This is a group of research scientists from eight UK universities working together to do scientific research on Excitonic Solar Cells. Researchers work in the areas of polymer solar cells, dye-sensitised solar cells...

This School Science Review article outlines the Space Academy programme led by the National Space Centre from 2008 to 2011 with the stated goals of harnessing the inspirational contexts of space and climate change to support GCSE, A-level and vocational students in their curriculum studies as well as to enhance...

A Catalyst article describing the species that have had the greatest impact on planet Earth during its billions of years of history. Which come out on top of the 'league table of life'? As hominids have only walked the Earth for part of its existence the article looks at the history of life, from the dawn of...

The Standards Unit: Improving Learning in Mathematics resources were produced as a response to the Smith report. The materials use active learning approaches originally designed for post-16 mathematics but for use across the secondary phase. The resources, and the work of the Standards Unit with leading maths...

This poster looks at the structure of matter. One side of the poster discusses the limits of imaging with light and the use of electron microscopes, and looks at the 20th century pioneers – from J. J. Thomson’s plum pudding model, through Rutherford and Chadwick’s advances in understanding the nucleus, to the use...