Developing a spreadsheet
Question How can I find out if a Spreadsheet actually works, and that it doesn’t contain any mistakes?
Test plan Suggest ways in which they can test that a spreadsheet actually works…. Examples: test data, deliberate input errors, checking results with a pocket calculator involving a Test Buddy.
In this lesson students are learning about: implementing a development plan
At the end of this lesson students will be able to: develop a given spreadsheet test the developed spreadsheet
Checking proposed spreadsheet developments work in pairs as Test Buddies on your spreadsheet development and action plans / task lists that you produced for homework (5 minutes each). Each student should carefully consider any suggestions made by their Test Buddy. Students should then consider together how best to test their modified spreadsheets and draw up a test plan
Some spreadsheet basics Your teacher will now demonstrate some basic spreadsheet skills including: Addition, Subtraction,Multiplication,Division Absolute cell referencing Using functions (SUM, AVERAGE, IF) Conditional formatting Creating validation rules Creating lists and combining with VLOOKUP Using Spinners
Addition, Subtraction,Multiplication,Division
Absolute Cell referencing
Using functions (SUM, AVERAGE, IF)
Conditional formatting
Creating validation rules
Creating lists and combining with VLOOKUP
Using Spinners
Next lesson… We will be creating our spreadsheet models using the skills we just looked at. You need to make sure that you are familiar with these as they will help you gain higher marks in the real CA.
Homework Plan at least two models. Start by stating your target, what you want to achieve (e.g. highest possible profit / donation, best balance between number of bags and profit / donation). Then identify which variable(s) you want to change and how. Note down your reasons for the changes.