Philip Fitter exercised each weekday.
On Monday he did 11 chinups.
On Tuesday he did 12 chinups.
On Wednesday he did 5 chinups.
On Thursday he did 11 chinups.
How many chinups did he do on Friday if his average (mean) for the five day week was 10 chinups per day?
Rintin Rep exercised each weekday this week. On Monday he did 11 chinups.
Each day his average number of chinups per day increased by one.
How many chinups did he do on Friday?
Barry Blue exercised each weekday this week. On Monday he did 11 chinups.
Each day his average number of chinups per day doubled.
How many chinups did he do on Friday?
Sonia Strong exercised each weekday this week. On Monday she did x chinups.
Each day her average number of chinups per day increased by one.
How many chinups did she do on Friday?
Hetty Health exercised each weekday this week. On Monday she did x chinups.
Each day her average number of chinups per day doubled.
How many chinups did she do on Friday?
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Topics: Starter  Algebra  Averages  Problem Solving
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Have you read Craig's book yet?Craig Barton must surely be the voice of Mathematics teachers in the UK. His wonderful podcasts interviewing the industry experts have culminated in this wonderful book. As Craig says: "I genuinely believe I have never taught mathematics better, and my students have never learned more. I just wish I had known all of this twelve years ago..." more... "How I wish I’d taught maths' is an extraordinary and important book. Part guide to research, part memoir, part survival handbook, it’s a wonderfully accessible guide to the latest research on teaching mathematics, presented in a disarmingly honest and readable way. I know of no other book that presents as much usable research evidence on the dos and don’ts of mathematics teaching in such a clear and practical way. No matter how long you have been doing it, if you teach mathematics—from primary school to university—this book is for you." Dylan Wiliam, Emeritus Professor of Educational Assessment, UCL. 
Casio Classwiz CalculatorThere is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a highresolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app). As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols! This calculator has a highperformance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more... 
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