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Exam Board: OCR Level: A-level Subject: Computer Science First Teaching: September 2015 First Exam: June 2016 Develop confident students with our expert authors: their insight and guidance will ensure a thorough understanding of OCR A Level computer science, with challenging tasks and activities to test essential analytical and problem-solving skills. - Endorsed by OCR for use with the OCR AS and A Level Computer Science specification and written by a trusted and experienced author team, OCR Computer Science for A Level: - Builds students' understanding of the core topics and computing skills required by the course units - Computing Systems, Algorithms and Problem Solving, and Programming Project - with detailed topic coverage, case studies and regular questions to measure understanding - Develops a problem-solving approach based on computational thinking required at both AS and A Level - thought-provoking practice questions at the end of each chapter gives opportunities to probe more deeply into key topics - Incorporates full coverage of the skills and knowledge demanded by the examined units, with exercises to help students understand the assessment objectives and advice and examples to support them through the practical element of the course.

Willie Green grew up in Canton, Mississippi, and he never saw any white people unless he went across the railroad tracks. But his mother's best friend was white, and whenever they met, they pressed their hands together. This simple act showed him that everyone could get along-something that would stay with him when the Civil Rights Movement swept through the nation. But after helping a cousin move his things out of a girlfriend's place-things that in fact, belonged to her-Green was arrested for burglary. When that same girl ended up dead, he was convicted of murder. He'd end up spending twenty-five years in prison-most of them in San Quentin-after a witness who had been high on cocaine and pressured by police blamed him for the crime. Green would not be freed until 2008, after the witness set the record straight. He looks back on a life defined by unexpected turns, race relations, his despair while on death row, and how he found hope and freedom in Just to Be Free.