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4. Algorithms and programming

#### What is an ALGORITHM

An introduction to algorithms using a flowchart with sequence, selection and iteration. The worksheet provided enables students to slow down their thinking to focus on each instruction in the algorithm until the last instruction is executed and the program ends.

#### IGCSE Computer Science worksheets

Topics included: Computer Architecture Ethics Input Devices Memory Storage and media Programming concepts Pseudocode and Flowcharts Algorithm Design

#### IGCSE computer science programming worksheets

Full set of worksheets for iGCSE computer science units included programming concepts, pseudo code and flowcharts and algorithm design and problem solving. Intended to be taught as linked units for a more comprehensive learning style.

#### Kodu-Rhythm Lesson 3(An Introduction to coding using Kodu)

Kodu is a friendly graphical programming language where students can build their own world and program objects within. This series of lesson uses kodu to introduce computer science terminology such as algorithm and variables to develop computational thinking skills.

#### [GCSE+IGCSE] Python Text Adventure Coding Challenge

This is possibly my most favourite piece of work to do with the students. I do it as an end of year activity when they are a bit more confident with the material. We create a zombie survival text adventure game and I have recently updated it to include questions similar to what has been in the recent exam and in the exemplar exam What is covered Local and Global Variables Variable Types Input and Validation Conditional Loops Fixed Loops Arrays Subprogram calls (Functions, Procedures and Pre-defined) Libraries Complex conditions and selection Repetition and Iteration What is included Word document with instructions, task overview and more detail on the activity Student Starting Python file (in zip folder) Teacher completed exemplar file Answer document to questions

#### [GCSE+IGCSE] Exam Style Questions on coding

Exam preparation questions on coding for Paper 2 Content Question sheet Zipped folder of Python code

#### [GCSE+IGCSE] Mini Project: Pentathlon

This is another of the mini projects that I get my students to complete in preparation for completing the coursework. Lesson Overview Depending on ability level, we start by completing flow charts and pseudocode to complete the design of the program. I sometimes prepare a complete one, but blank out some of the steps to give to my weaker students. Better students I will give blank designs to and somewhere in between for the other students. At end of this lesson, we look at how the code works In preparation for the next lesson, I get the students to watch the video as a homework task. The next lesson, the students complete the program using their pseudocode / flow charts completed in previous lesson. If they are still struggling, they can watch the video again in class time, as well as me able to wander around and help. Students who are better at coding will easily be able to add more functionality to this project Included Zipped file contains: 2 CSV files required for the project and the completed solution file (1 of the CSV files is the file writing part) Video Support of completing the solution Whilst this is mainly aimed at students, it would be useful PD for any Computer Science teachers who are still struggling to understand the complex programming side of the course What this teaches File Reading from CSV file File writing back to CSV file Storing Data in 2D arrays Functions/Procedures Parameter Passing Complex Functions (Finding Minimum algorithm using 2D arrays) Combining

#### [GCSE+IGCSE] Mini Course work project with Video and Solution Computer Science

This is a smaller project that uses File Reading, 2D arrays and some manipulation of the data stored in it. A complex project, smaller than a final year project, but building in complexity. Included: 3 solution videos, completed solution file (.py) and zipped (TES doesn’t allow this file type) with the CSV file to access - save these in the same folder, or your program will not work

#### Computer Science Algorithms Test

This is the test my students complete after they have finished my Algorithms and Problem Solving unit.

#### [GCSE + IGCSE] Python Coursework Mini Project 2D arrays, File Reading and Writing and Sorting

**Teaching Duration: ** For main tasks, 3 lessons. This task can be expanded to challenge the top level students to add more and more features in. A further 1 to 2 lessons where we reverse engineer the flow charts which is very useful skill for the final exam Who is it for: Students studying GCSE in preparation for final project. Students studying IGCSE who are consolidating their skills at developing a large project. Also useful for staff struggling with teaching the course What’s included Instruction File: Includes detailed instructions and code that students should enter to complete the project Student File: partially completed code that students add to Teacher File: Completed project Text File: This project includes file reading, this is the text file to use. Make sure to save it in the same folder as the python file, or it will not work This covers every area of the programming side of the course from Units 1 and 2 completely. This is a perfect project for students to practice a larger project before tackling the coursework, or as a revision task for the practical exam / paper 2 by reverse engineering code/pseudocode and flow charts which is always a tricky area to learn. This has been in all exemplar papers, as well as the 2018 exam.

#### [GCSE+IGCSE] 2D Arrays introductory Task

Activity is written using standard pseudocode/python, so easy to change and update for any other programming language . Use this to introduce arrays and records and discuss the diffrences between them both - with python coding in mind, as well as the exam based pseudocode being different from Python Questions from the new curriculum on 2D array data manipulation

#### Scratch [Modelling and Simulation]

My activity booklet for building a model of a the solar system in Scratch. Students complete some Internet research first (gives us a chance to look into searching techniques, fake news and logging data/information) We then spend a few lessons coding the solution to the model, getting the sun to rotate around the sun. Adding the moon to rotate around earth and then adding the other planets. This is a really fun activity that I use as a transition from talking about Internet safety, Internet skills to programing in Scratch, I have also included an example solution file, so you can learn how to code this particular solution, as well as demonstrate a working model the students.

#### Python Problem Solving Algorithm and Coding Challenges [GCSE + IGCSE]

A series of 11 coding challenges for students. This is a unit of work that I complete once my students have seen the basics of coding and have used the Mathematical Operators in Python (MOD % / DIVISION // INTEGER DIVISION) There are a variety of logical puzzles to work through and solve. I have included the solutions to all problems (11 Python files in ZIP format (TES doesn’t support direct upload of .py files)) For this unit, I had students work in groups. For my students who were struggling, I prepared some files with the pseudocode already typed in, or I hand drew some flow charts for some differentiation. For many of these, it would be very easy to build on and challenge your top level students to make some of the challenges even more difficult.

#### Scratch Programming Fractal Tree Activity

One of the areas of the national curriculum that we should be introducing students to is RECURSION. This is an excellent activity to introduce that concept in a visual way with a simple task to create a fractal tree in Scratch programming. This activity I had a learning observation on. I had my students work in small groups to try and complete the main activity together. When they finished this, they were to research other fractal activities on-line and see what they could create. Students really enjoyed this activity at the end of the Scratch topic to introduce a very complex topic that is not part of GCSE, but that appears again at IB level and A level. I expect students to learn that recursion is a complex rule that simplifies programs, but is very difficult to understand and it is a function that uses itself to solve a problem.

#### Scratch Programming Test 2 + Answers

End of section test (I use with Y8 students) to assess their comprehension of coding using Scratch (I have uploaded my unit of work which goes with this. This is used a long with the assessment activity uploaded in the other unit of work, to check student progress. This is a problem solving assessment which tests students abilities to read and interpret code, as well as explain it. Checks their logical and computational thinking skills and ability to spot and correct errors.

#### [GCSE + IGCSE] Introduction to Algorithms (Problem Solving)

This is the unit that I complete before I start programming with my GCSE students. It features a variety of problem solving activities that I use to introduce Flow Charts and Pseudocode. This has massively helped my students understand the concepts and process of planning before progressing onto writing code. This covers a lot of the concepts of Unit 1 and Unit 2 from the curriculum. Introduces the ideas of Abstraction, Decomposition, Algorithms etc

#### Coding Apps with BitsBox - Lesson Plan

Design &amp; Develop Mobile Apps A computing lesson plan and associated resources for KS2 children designing and developing a game for mobile devices. Includes step-by-step lesson plan, support materials and pre-written program files. More free primary computing lessons and resources available at iCompute

#### Search/Sort algorithms lesson activities

Slide 1 contains a whole pack of individual images of playing cards for use in demonstrating Search/Sort algorithms. Task slide include link to BBC Bitesize revision pages and activities to help students revise the following: Binary and Linear SEARCH Merge, Bubble, Quick SORT Can be easily adapted to suit others.

#### [GCSE+IGCSE] Computer Science PYTHON Arrays

Included: 10 project based activties. These address some standard algorithms (Search, Find Max and Min) and build into some menu building areas which uses Functions/Procedures. Solution files to all projects, including any advanced/challenge areas Links to video lessons for some projects End of Unit Project activity This is my very expansive unit of work on functions. This is the second last unit of work that I complete with my GCSE students, before we start the project (the final one being 2D arrays and records with File Reading/Writing, as well as some example projects) This is a very thorough set of activities which are all mini projects. Depending on the time you have, you could take each activity in turn and spend time designing, implementing and testing each of them. SOme of them I worked on and completed in pairs. There are 10 projects in total, each with a solution which has been fully tested. In some cases, to support my weaker students I spent some time making video lessons. These are hosted on youtube and are private and not accessible without the links in the documents - useful for professional development, for students who miss lessons or to support lower ability students (some of the areas covered are more advanced, so in fact my strongest students were also using them to advance their skills)

#### [GCSE+IGCSE] Strings, Functions and Procedures Unit

This is my Strings, Functions and Procedures unit that I use in the lead up to the end of Term 1 at Christmas. It compromises 9 individual tasks. Each of these tasks, I take at least two lessons to deliver with students. I start off each with some starter questions (included file) and a discussion of the task. At this point, I would expect my students to be comfortable with planning in pseudcocode and flow charts. For each activity, I either get them to design it for Scratch, or I create a partially completed plan which they then fill in the blanks (These are usually hand drawn, so I didn’t include them) We then code the solutions which normally takes a full lesson. To support and challenge students, several activities contain challenging scenarios to keep better students engaged allowing me to support weaker students to aim towards completing minimum requirements. After we completely implement them, we spend time discussing test plans, the purpose of testing etc. This covers a lot of the theory in the course of looking at modular testing, why we use predefined functions/procedures, how large groups of programmers work together to decompose a task and implement it simultaneously etc. For each of the 9 activities included, I have included blank student files (when they are required) tested solutions for each activity and the overview of the task with instructions. For this activity, it will require a bit of teacher input to explain task at the beginning. At this point, I show students the completed activity, so they know what they are aiming to produce. For my weaker students, I give them a copy of the completed code (eventually) and get them to add internal commentary, or do testing. In some cases, I make simple syntax errors in it and get them to fix it. This activity booklet takes me around 8-10 weeks off 3 lessons per week. We use the Christmas themed lessons at the end, this introduces/recovers arrays, as well as some challenging problem solving that we all work on in groups to complete.

#### GCSE Computing Paper 1 Exam Style Questions and Answers

GCSE Computing Paper 1 Questions and Answers. Great for tests or student revision. Based off of the OCR Specification (9-1)

#### FREE Python lesson - Introduction to Python

i created a nice introduction to Python for Year 7. It starts with the basics of how to use Python for beginners. Year7 really enjoyed it. I hope it is useful to you. It is a powepoint so you can amend it to your class.

#### Spreadsheet A&E - OCR Cambridge Nationals Information Technologies

This is a resource that goes through each of the formulae that students need to know for the course. It has an activity for them to practice each formula and apply it to a working situation. My students come back to this when they build any spreadsheet and can’t remember how to do a certain formula.

#### AQA GCSE Computer Science Workbook (9-1)

A workbook covering the whole of the AQA GCSE Computer Science course. Each section has a combination of theory and questions. In class we use it to help students struture their notes and all students are provided with the workbook at the start of the year. Depending on your version of Word, occasionally the formatting may be slightly off-kilter with some information jumping between pages. So it is worth double checking before it goes to print - I learnt that the hard way!

#### Lesson: algorithms, decomposition and anstraction

The lesson is suitable for KS3 / GCSE Computer Science. Starter, asking pupils to comment on an article about the impact of algorithms Presentation on what an algorithm is, giving examples of algorithms, different kinds of computer algorithms and how these sets of instructions can be developed into a program. Sample python programs supporting the presentation on algorithms Presentation on decomposition saying what it is, giving examples and looking at how decomposition can apply to programs effecting the way a person programs (eg functional programming) Task to decompose an authentication probem. Presentation on abstraction, looking at what it is, giving examples and considering what data can be removed as part of the abstraction process. The pupils are given a task to remove any unecessary detail from an algorithm. The pupils complete five abstraction questions . Plenary, the pupils split into pairs and are given a problem. One person explains in a series of steps how to solve the problem (decomposition), whilst the other person tries to intervene to remove any unecessary detail from the explanation (abstraction) Homework task on how to make toast breaking this problem down using decomposition / abstraction.

#### [GCSE Computer Science] 2D Arrays Introduction [IGCSE also]

A series of activities to introduce students to 2D arrays. This is an area my students regularly struggled with understanding the concept. This year their test results were much improved compared to my last year groups - I believe this is mainly down to spending more time on getting students to visualise where data is, how it is stored and accessed. We spent a week on this activity - discussing the theory at the beginning of the lesson, tracing the execution, coding the solutions and then practicing writing flow charts for the equivalent pseudocode. I also updated this to work with records, but I will upload as a separate resource,

#### Boolean expressions and Error Recognition - Python-

Boolean expressions and Error Recognition lesson including tasks and homework. Any feedback is appreciated, on whether you like it or not or whether you think a specific part of it can be improved.

#### KS2 & KS3 Creating Fun Games using Python

This 10 page photocopiable resource has been produced to provide KS2 and KS3 students with exciting and engaging opportunities to learn coding concepts using Python in a series of 4 fun standalone projects. The projects are: Game 1 -Play the name game - Students have fun with their name. Game 2 -Guess the number -Students have fun making a game to guess the number. Game 3 - Mystery of the Crystal Ball - Students have fun looking into their future. Game 4 - Two Player Horse Race Game Each project takes from 30 minutes to an hour and a half to complete and all of them include a series of activities to extend learning.

#### Edexcel Computer Science 9-1 Paper 2 bundle

This is a whole half term of work relating to the questions appearing in the second Computer Science paper. The lessons are on input, processing, output selection statements boundary testing recognising constructs trace tables a test The lessons guide the learner from easy to understand exercises, to GCSE level exercises. There is a learning question focus for each lesson, but in some cases the bronze silver and gold outcomes have been left blank for you to tailor to your classes. There is enough work here for a half term.

#### Lesson: efficiency of algorithms

The lesson is suitable for GCSE / KS3 Computer Science (see other similar lessons in this series) To understand that more than one algorithm can be used to solve the same problem. To compare the efficiency of algorithms explaining how some algorithms are more efficient in solving algorithms than others, specifically space and time efficiency of algorithms Please leave a comment if you like the resource. Lesson plan Presentation on space efficiency that looks at a simple algorithm of adding up consecutive numbers (eg 1 + 2 + 3 + 4 … ) in a sequence, then compares this approach with using a loop and then looks at using an equation to solve the problem as an example of space efficiency in an algorithm. Pupils program these algorithms for themselves to see how lines of code can be reduced in a program. The above presentation is supported by three python programs (eg sequence, loop, equation python programs) Presentation on time efficiency that looks at two algorithms (one using a loop and another using an equation) to see which ones are more time efficient. Pupils program these algorithms to see how execution time of a program can be reduced. The above presentation is supported by two python programs (eg loop and equation python programs) The pupils are then given a program task to try to create a program that will calculate the nth term of the sequence 2, 4, 8, 16 in the most efficient way. A stretch and challenge exercise considers how to program a more difficult sequence of numbers Plenary presentation quiz to test pupils knowledge Homework looking at definitions of space and time efficiency and an example algorithm (answers provided)

#### File handling - Python-

File handling presentation and tasks for KS4/KS3 programming unit / python. Please make sure to leave feedback if you like it or if you think it can be improved somehow, this will allow me to improve it if needed.

#### 2D Arrays - Python -

2D Arrays - Python - for KS4 and KS3 with tasks and presentation.

#### GCSE Computer Science: programming languages starter / review

A very quick review for the programming languages topic of GCSE Computer Science. Pupils must simply complete the diagram to show the relationship between high level and low level languages, and include examples of each. Useful to review prior learning. Separate answers sheet provided. Fully editable resource.

#### Python exam papers and mark scheme - KS3 - revision card included.

2x 40 marks exam papers with mark scheme. Used for KS3 mid/end of unit exam. Revision card and 1 revision lesson included.

#### Arrays in python

slides and worksheet on arrays in python. 2 Lessons, mainly for

#### Introducing the BBC Microbit

This download includes 4 presntations and a homework sheet. It is designed to introduce the wonderful BBC Microbit. Some schools were lucky enough to get some of the 1 million free Microbits give away at launch, the rest have to buy them (~£17 on Amazon). The pack starts with incrementing numbers, a doddle but gives the slower students time to get used to the web app. The 2nd lesson introduces selection in the form of the infamous “rock, paper, scissors” game. Lesson 3 encourages the students to choose a game to build. Lesson 4 uses the 4 sensors to test light levels, temperature, angles &amp; compass in a science worksheet. Please give me useful feedback in a review and follow me.

#### Python Worksheets KS3

A set of 5 Python worksheets. Includes practical activities and questions. Comes with video guidance for each worksheet, which helps with differentiation. Python worksheet #1 - Given separately on TES as a free sample. For absolute beginners. Getting set up, using the Shell and 1st program using the editor. https://www.tes.com/teaching-resource/python-worksheet-for-ks3-11912924?theme=1 Python worksheet #2 - Using variables and inputs. Python worksheet #3 - Conditional statements (IF, ELIF, ELSE). Python worksheet #4 - Arithmetic and relational operations. Stretch and challenge - using the Math library. Python worksheet #5 - Commenting and debugging

#### Python Worksheet for KS3

Free Python worksheet for absolute beginners. Includes practical activities and questions. Comes with video guidance for the worksheet, which helps with differentiation. Includes step-by-step guide on getting set up and using IDLE. Maths activities using the Shell. Using the editor and making a simple program. Finally there are a series of questions to check understanding.

#### OCR GCSE Computing - Translators presentation task

Student are required to create a presentation on translators in groups or pairs, to present to rest of the class