This lesson uses 17 multiple-choice questions to challenge students to apply their understanding to the calculation sections of the course. The PowerPoint and accompanying resources are designed to act as revision during the final weeks leading up to the AQA GCSE Combined chemistry exams and the following topics are covered: Atoms and ions Isotopes Concentration of solutions Mole calculations using Avogadro’s constant Calculating relative formula mass Mole calculations using mass and relative formula mass Calculating masses in reactions Calculating energy changes in reactions Calculating the mean rate of reaction All 17 questions have answers embedded into the PowerPoint along with explanations and are followed by additional tasks to further check understanding if it was initially limited.

This lesson revisits the topic of random and systematic errors and also challenges students on other scientific skills such as identifying variables. Students tend to find this topic confusing, so the PowerPoint and accompanying resources have been designed to support them to identify whether an error is random or systematic and then to understand what to do next. The lesson guides the students through a series of real life examples and shows them how to spot each type of error. There is a considerable mathematical element to this lesson, including the calculation of means or missing values in a table. The lesson concludes with a series of exam-style questions where the students have to apply their understanding of identifying errors, variables and calculating means.

An engaging lesson presentation (42 slides) and associated worksheets that uses a combination of exam questions, quick tasks and quiz competitions to help the students to assess their understanding of the topics found within TOPIC 6 (The rate and extent of chemical change) of the AQA GCSE Chemistry specification (specification point C4.6) The topics that are tested within the lesson include: Calculating rates of reactions Factors that affect the rate of a reaction Collision theory Reversible reactions Equilibrium Changing the equilibrium position Students will be engaged through the numerous activities including quiz rounds like “Don’t get iRATE” and “Under PRESSURE” whilst crucially being able to recognise those areas which need further attention

This is an engaging revision lesson which uses a range of exam questions, understanding checks, quiz tasks and quiz competitions to enable students to assess their understanding of the content within topic 6 (Chemical energetics) of the Cambridge IGCSE Chemistry (0620) specification. The lesson covers the content in both the core and supplement sections of the specification and therefore can be used with students who will be taking the extended papers as well as the core papers. The specification points that are covered in this revision lesson include: CORE Describe the meaning of exothermic and endothermic reactions Interpret energy level diagrams showing exothermic and endothermic reactions Describe the release of heat energy by burning fuels State the use of hydrogen as a fuel SUPPLEMENT Describe bond breaking as an endothermic process and bond forming as an exothermic process Draw and label energy level diagrams for exothermic and endothermic reactions using data provided Calculate the energy of a reaction using bond energies Describe the use of hydrogen as a fuel reacting with oxygen to generate electricity in a fuel cell. The students will thoroughly enjoy the range of activities, which include quiz competitions such as “E NUMBERS” where they have to recognise the differences between endothermic and exothermic reactions whilst crucially being able to recognise the areas of this topic which need their further attention. This lesson can be used as revision resource at the end of the topic or in the lead up to mocks or the actual GCSE exams

This is an engaging revision lesson which uses a range of exam questions, understanding checks, quiz tasks and quiz competitions to enable students to assess their understanding of the content within topic 5 (Electricity and Chemistry) of the Cambridge IGCSE Chemistry (0620) specification. The lesson covers the content in both the core and supplement sections of the specification and therefore can be used with students who will be taking the extended papers as well as the core papers. The specification points that are covered in this revision lesson include: CORE Define electrolysis as the breakdown of an ionic compound, molten or in aqueous solution, by the passage of electricity Describe the electrode products and the observations made during the electrolysis of a range of electrolytes State the general principle that metals or hydrogen are formed at the negative electrode (cathode), and that non-metals (other than hydrogen) are formed at the positive electrode (anode) Predict the products of the electrolysis of a specified binary compound in the molten state Describe the reasons for the use of copper and (steel-cored) aluminium in cables, SUPPLEMENT Relate the products of electrolysis to the electrolyte and electrodes used Describe electrolysis in terms of the ions present and reactions at the electrodes in the examples given Predict the products of electrolysis of a specified halide in dilute or concentrated aqueous solution Construct ionic half-equations for reactions at the cathode Describe, in outline, the manufacture of aluminium from pure aluminium oxide in molten cryolite and chlorine, hydrogen and sodium hydroxide from concentrated aqueous sodium chloride The students will thoroughly enjoy the range of activities, which include quiz competitions such as “Have you got the SOLUTION” where they have to compete to be the 1st to name the products at the electrodes whilst crucially being able to recognise the areas of this topic which need their further attention. This lesson can be used as revision resource at the end of the topic or in the lead up to mocks or the actual GCSE exams

This is an engaging revision lesson which uses a range of exam questions, understanding checks, quick tasks and quiz competitions to enable students to assess their understanding of the content within topic 3 (Chemical changes) of the Edexcel GCSE Chemistry specification. The specification points that are covered in this revision lesson include: Recall that acids in solution are sources of hydrogen ions and alkalis in solution are sources of hydroxide ions Recall that the higher the concentration of hydrogen ions in an acidic solution, the lower the pH; and the higher the concentration of hydroxide ions in an alkaline solution, the higher the pH Recall that as hydrogen ion concentration in a solution increases by a factor of 10, the pH of the solution decreases by 1 Recall that a base is any substance that reacts with an acid to form a salt and water only Recall that alkalis are soluble bases Explain the general reactions of aqueous solutions of acids with metals, metal oxides, metal hydroxides and metal carbonates to produce salts Describe the chemical test for hydrogen and carbon dioxide Describe a neutralisation reaction as a reaction between an acid and a base Explain an acid-alkali neutralisation as a reaction in which hydrogen ions (H+) from the acid react with hydroxide ions (OH–) from the alkali to form water Explain how a soluble salts is prepared from an acid and an insoluble reactant Explain how soluble salts are prepared from an acid and a soluble reactant Recall that electrolytes are ionic compounds in the molten state or dissolved in water Explain the movement of ions during electrolysis Explain the formation of the products in electrolysis Write half equations for reactions occurring at the anode and cathode in electrolysis Explain oxidation and reduction in terms of loss or gain of electrons The students will thoroughly enjoy the range of activities, which includes quiz competitions like “From NUMBERS 2 LETTERS” where they compete to be the 1st to get the abbreviation Oil Rig whilst crucially being able to recognise the areas of this topic which need their further attention. This lesson can be used as revision resource at the end of the topic or in the lead up to mocks or the actual GCSE exams

This REVISION resource has been written with the aim of motivating the students whilst they are challenged on their knowledge of the content in Chemistry TOPIC 2 (States of matter and mixtures) of the Edexcel GCSE Combined Science specification. The resource contains an engaging and detailed PowerPoint (65 slides) and accompanying worksheets, most of which are differentiated to allow a range of abilities to access the work. The wide range of activities, which include exam questions and quiz competitions, have been designed to cover as much of topic 2 as possible but the following sub-topics have been given a particular focus: Pure substances in Science Using melting and boiling points to distinguish between pure and impure Separating mixtures using simple and fractional distillation Determining a state of matter using data Physical changes Crystallisation The mobile and stationary phases of paper chromatography Calculating the retention factor The treatment of water to make potable water This resource is suitable for use at the end of topic 2, in the lead up to mocks or in the preparation for the final GCSE exams.

This revision resource includes exam questions, understanding checks and quiz competitions, all of which have been designed to motivate and engage the students whilst they assess their understanding of the content found in topic 2 (Experimental techniques) of the CIE IGCSE Chemistry specification for examination in June and November 2020 and 2021. This revision resource contains an engaging PowerPoint (50 slides) and associated worksheets, some of which have been differentiated to help and challenge differing abilities. The range of activities have been designed to cover as much of the Core and Supplement content as possible but the following sub-topics have been given particular attention: Identify substances and assess purity from melting and boiling point data Describe and explain the method of distillation Understand how fractional distillation separates mixtures according to their boiling points Describe and explain the method of crystallisation Demonstrate knowledge and understanding of paper chromatography Interpret simple chromatograms, including the calculation of the Rf values In addition, topics from other modules such as states of matter at different temperatures are covered so that students can see the importance of being able to make connections and links between Chemistry topics.

This revision resource contains an engaging and informative PowerPoint (55 slides) and differentiated worksheets that will enable the students to assess their understanding of the topic C9 content of the CIE IGCSE Combined Science specification for examination in June and November 2020 and 2021. The range of exam questions (with explained answers), quick tasks and quiz competitions have been designed to cover as much content as possible but the following topics have received particular attention: • The properties of the alkali metals, halogens and noble gases • Explaining the reactivity of these groups in terms of electron configurations • The transition elements • The arrangement of the Periodic Table • Predicting properties of the undiscovered elements The question sheet about the properties of the different groups has been differentiated three ways so that a range of abilities can access the work

This revision resource has been designed to include a range of activities that will engage the students whilst they assess their understanding of the content of topic C12 of the CIE IGCSE Combined Science specification for examination in June and November 2020 and 2021. Exam questions, quick tasks and quiz competitions such as “Are you on FORM” will challenge the students on their recall of the content as well as their ability to apply this knowledge. The lesson was written to cover as much of the content as possible, but the following topics have received particular attention: • The conditions needed for cracking • Alkanes and alkenes as the products of cracking • Alkanes as saturated hydrocarbons with single covalent bonds between their atoms • Alkenes as unsaturated hydrocarbons with one double covalent bond • Testing between saturated and unsaturated hydrocarbons using aqueous bromine solution • The fractional distillation of crude oil • The uses of the fractions This resource contains an engaging PowerPoint (51 slides) and associated worksheets and is ideal for use at the end of this topic or in the lead up to mocks or the actual terminal exams

This is a concise revision resource which has been designed to cover the crucial details of topic C5 (Electricity and chemistry) of the CIE IGCSE Combined Science specification, for examination in June and November 2020 and 2021. The topic of electrolysis is commonly assessed in the examinations so time was taken during the design to ensure that understanding is constantly checked so that any misconceptions are addressed. The following content receives particular attention in this revision lesson: The use of the terms electrolyte, electrode, cathode and anode Understanding that solid ionic compounds cannot be used in electrolysis, but only electrolytes when molten or in aqueous solution The attraction of positive ions to the cathode and the gain of electrons The attraction of negative ions to the anode and the loss of electrons Predicting the products at the electrodes The lesson finishes with a summary task about the electrolysis of aluminium oxide where students have to apply their knowledge. This sheet has been differentiated two ways so that students of different abilities are able to complete the task

This revision resource contains an engaging PowerPoint (56 slides) and associated worksheets, one of which has been differentiated two ways to allow students of differing abilities to access the work. The range of activities cover the content of Topic C4 (Stoichiometry) of the CIE IGCSE Combined Science specification, for examination in June and November 2020 and 2021. The aim was to cover as much of the content as possible but the following topics have received particular attention: Naming compounds containing 2 or 3+ elements Constructing word equations for general chemical reactions Monatomic or diatomic molecules Writing formulae for ionic compounds using the charges on the ions Balancing symbol equations Writing fully balanced chemical symbol equations with state symbols Students are given hints and guidance throughout the lesson so they can build confidence in the lead up to an end of topic test, mocks or the terminal exams.