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OCR Chemistry B (Salters’) Chemistry in Practice F333/01 Andrew Jones Principal Moderator Overview • Skill I Competence 12 marks • Skill II Measurement 12 marks • Skill III Analysis & Evaluation 12 marks • Skill IV Observation 12 marks • Skill V Interpretation 12 marks TOTAL 60 marks Skill I Competence • This Skill assesses the ability of Candidates to carry out practical work. • It is based upon performance throughout the year. • There are three strands of competence: - safe working; - manipulative skills, including resolving problems; - organisation. • You must cover all six types of practical activity (21 opportunities as part of the course). • Use the OCR Mark Descriptors (see Practical Skills Handbook). • Choose the ‘best-fit’ mark for each activity type. • Use the pro-forma available on Interchange as an ‘aide-mémoire’ – can use words or numbers (this represents best practice). • Review the process at the end of the first term to provide a ‘working mark’ - complete assessment in April (needs to reach moderator by 15th May). • The six types of practical activity are: - performing a titration; - making thermochemical measurements; - qualitative test-tube experiments; - experiments involving ICT; - preparing an organic compound; - collaborating with other students. Titration Thermo- Qualitative ICT Organic prep Collaborative chemical EL 1.2 4.1 1.3 DF 2.1 2.2 4.4 2.2 ES 4.1 2.2 4.4 6.3 4.1 5.1 4.4 6.2 A 3.2 9.1 6.2 3.3 PR 2.1 4.3 Skills II, III, IV and V • OCR provide: - Tasks for Candidates; - Mark Schemes for Teachers; - Instructions for Teachers and Technicians. • The Tasks are taken under controlled conditions – they cannot be taken away. • Candidates cannot use books or notes – they are only permitted the Data Sheet. • A Candidate cannot modify answers after that Task has been completed. • A Candidate cannot repeat the same Task, but can do a different Task to assess the same Skill. In this case the best mark is used for the Skill. • Candidates should not take a Task until they have had opportunity to develop the necessary skills. • When complete mark strictly according to the OCR Mark Scheme. • Skills II and III may be coupled assessments from the same Task, partially coupled, or completely decoupled. • Skills IV and V also may be coupled, partially coupled or decoupled. • There will always be three choices of Task for each Skill per year. Skill II (Measurement) • Examples here include various types of volumetric analysis and thermochemical experiments. • Assessment is made of the ability to: - make measurements and to record data; - work accurately when compared to a teacher value. Skill III (Analysis and Evaluation) • Assessment is made of the ability to: - carry out a calculation from given data; - calculate percentage uncertainty associated with measurement; - comment upon the limitations of practical procedures. Skill IV (Observation) • Examples here include observing test-tube reactions from Group II, Group VII, Organics. • Assessment is made of the ability to: - make and record accurate observations. Skill V (Interpretation) • Assessment is made of the ability to: - identify patters or trends in reactions; - identify types of reactions; - write equations (including ionic) for reactions. Moderation • Centres will be required to submit marks to OCR on an MS1 or electronic equivalent. • OCR will request a sample of work to include marked Tasks for Skills II, III, IV, and V to be sent to a named moderator. • Also sent to the moderator will be: - the mark for Skill I (+ supporting documents); - the Centre Authentication Form (CCS160); - the marks summary spreadsheet.
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