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© Boardworks Ltd 2010 1 of 14 Solving Problems with Spreadsheet Models.

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1 © Boardworks Ltd 2010 1 of 14 Solving Problems with Spreadsheet Models

2 © Boardworks Ltd 2010 2 of 14 Teacher’s notes included in the Notes Page Flash activity. These activities are not editable. Web addresses Icons key: For more detailed instructions, see the Getting Started presentation Functional Skills check Student task accompanies this slide Printable activity This lesson will cover: Using spreadsheet models to assist with assessment. Financial forecasting. Using Goal Seek to reduce queues.

3 © Boardworks Ltd 2010 3 of 14 Case study: assessment A teacher has been looking at the marks for her class and wondering how to improve their results. She has set a target grade for each of her students; some have reached it and some have not. Her students have been working on 4 different modules. They can resit one of those modules in the final session. She needs to decide which module each student should resit. The extra revision is likely to improve their marks, but she is not sure by how much.

4 © Boardworks Ltd 2010 4 of 14 The rules MarkGrade A*320 A280 B240 C200 D160 E120 If a student resits a module, the highest mark counts Each module is marked out of 100 At the end of the course, the best mark for each module is added up to form a total You need these marks for each grade.

5 © Boardworks Ltd 2010 5 of 14 Pick a function

6 © Boardworks Ltd 2010 6 of 14 Meeting targets Now she has the totals, the teacher wants to know which students have met their target scores. An IF function will compare the two values and give a message based on any rule she chooses. The message will say “below target” if the student did not get their target points. In this case she will set up a message that says “met target” if the student got their target mark or better.

7 © Boardworks Ltd 2010 7 of 14 Conditional formatting Another way of showing how well the students perform is called conditional formatting. This changes the way the cell looks depending on a rule the teacher sets. In this case, she has chosen to colour cells like this: Better than target – green Met target – yellow Lower than target – red

8 © Boardworks Ltd 2010 8 of 14 Looking up the grades MarkGrade 120E 160D 200C 240B 280A 320A * Remember the table of grades? How do we find a grade from it? We take the mark the student got, and find it in the first column. We then write down the mark from the second column Raj got 241 points. What grade did she get? 241 is over the B threshold but not enough for an A, so she got a B.

9 © Boardworks Ltd 2010 9 of 14 VLOOKUP Spreadsheets can speed up this process by using the VLOOKUP function. Look up the mark in H2 in the table called grades Give the answer from column 2

10 © Boardworks Ltd 2010 10 of 14 Counting up the grades The column with the grades in. The grade we are counting. The teacher wants to know how many students got each grade. We can use a COUNTIF function to do that: =COUNTIF($I$2:$I$8,"E")

11 © Boardworks Ltd 2010 11 of 14 Modelling Now the teacher has set up the rules, she can experiment with the values to find the best way to increase the overall grades. She can ask questions such as “What if all students got ten more marks in Module 3?”

12 © Boardworks Ltd 2010 12 of 14 Financial forecasting Changing data in a spreadsheet allows you to model the effect of altering different variables. For example, a fashion company has decided to put on a fashion show. They have added up all their costs and revenues and put them into a spreadsheet. On their first projection it looks like they will make a big loss. There are savings available to cover this but they still want to make a profit. Look at the next slide and decide what they could alter.

13 © Boardworks Ltd 2010 13 of 14 Changing variables Some factors would be fixed costs. But other variables can be changed. What could you alter to make an estimated profit?

14 © Boardworks Ltd 2010 14 of 14 Case study: the supermarket

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