28 July 2017

Casio Calculator Pricing

The idea for this all started in June 2017. With new calculators for A Level and much parental confusion about what Year 7 students should be buying, I asked:

So here it is!

These are the current UK prices for the 3 newest models of Casio calculator for schools.
You will find cheaper prices on eBay and Amazon for some products, but they may be from overseas, not contain UK manuals, or be programmed in a different language. Bulk orders may incur customs duty.

Let me know if you see any cheaper deals: email adamcreen@hotmail.com or tweet @adamcreen

Last update: 18th November

Casio fx-83/85GT+
For Years 7 to 11

This calculator is the best one to buy for GCSE

It is not suitable for A Level even if the pack says so
The fx-85 is the solar model, but always buy whichever is cheapest, solar or not makes no difference
May be available in black, pink, blue and white, but STILL buy whichever is cheapest!

  • Wilko: £8.50 - Best Buy and back in stock
  • Tesco & Argos: £9.99 - only on Tesco Direct, but store may have stock
  • Staples: £11.39
  • Sainsburys & Asda: £12.00
  • WH Smith: £12.49
  • Ryman: £12.99

School Suppliers (ex VAT/inc VAT) - discounts for bulk orders:

Casio fx-991EX Classwiz
for A Level

This calculator is the best one to buy for A Level

It is also allowed for all GCSE exams (except the non-calculator paper!) but is a lot more expensive than the FX83/85
90 day free emulator offer: https://edu.casio.com/products/classroom/classwiz/

  • Tesco / Tesco Direct: £25.00 - Best Buy
  • Argos: £28.99
  • Ryman: £29.99
  • WHSmith: £34.99
  • Staples: £35.99
School Suppliers (ex VAT/inc VAT) - discounts for bulk orders:

Casio fx-CG50 graphic calculator

This is not a requirement for any GCSE or A Level course

1 year free emulator offer: https://education.casio.co.uk/1-year-emulator-licence-offer/


  • Staples: £114.59 - Best Buy
  • Tesco Direct: £125.00
  • Ryman: £129.99
School Suppliers (ex VAT/inc VAT) - discounts for bulk orders:

5 July 2017

Pearson Textbook Corrections

This page will be kept updated with any corrections needed for the new 2017 Pearson A Level Maths textbooks. This includes in notes, exercises, answers or Solutionbank.

Please send any errors you find to adamcreen@hotmail.com or tweet @adamcreen

Hall of Fame: @drfrostmaths@iisrootminusone, @meganguinan1, @PCMaths@CP3fxy, Chandler Cranfield, Jo Wexler, Helen Crosbie, Ben Stroomer, Rhea Premi, Luke Goldstraw, Louis Siow, and anonymous commenters - thank you all!

You'll be pleased to hear that Pearson are aware of this blog and are using it before reprinting any of the textbooks, so do keep sending in the errors you spot, and you can use their email address of resourcescorrections@pearson.com if you want.

Pure Year 1

Check your ISBN:
9781 292 20826 8 is the OLD uncorrected version 1
9781 292 18339 8 is the NEW (not very corrected) version 2
You can also tell version 2 as it has the number 1 at the bottom of the spine

page 39, section 3.1
amend to:
"Linear simultaneous equations in two unknowns, that are neither equivalent nor contradictory, have one set of values that will make a pair of equations true at the same time."

page 50, example 11
first line of the solution should say >2 rather than >x, in order to match the question - this is one thing that has been corrected in version 2!

page 52, exercise 3F, question 1
part b) does not make sense, as you would need both equations in the form y= before writing the inequality. You could change it to L1>L2 but that is not a proper inequality. Instead it should read
3 - 1.5x > x-5
The worked solution is also wrong in this respect

page 55, exercise 3G, question 2
the answer in the book is completely correct, but the answer in the SolutionBank has the line x>-1 as dotted rather than solid

page 55, exercise 3G, question 3
the first inequality should be < rather than > in the question - this is one thing that has been corrected in version 2!

page 65, exercise 4B, question 1i
mistake in the solution online, the x value on the graph should be plotted at '-5' however they have plotted it at '-3'

page 74, exercise 4E, question 1e (ii)
mistake in worked solutions online, should be positive cube root not negative cube root

page 74, exercise 4E, question 1f (ii)
mistake in worked solutions online, should be (3,0) not (5,0)

page 122, exercise 6D, question 10
question poorly phrased as it asks for the range of possible values for k twice - this is one thing that has been corrected in version 2!

page 155, Mixed Ex 7, question 23
the correct answer is 3 as the working in the back forgets to square root.

page 164, exercise 8C, question 2b
the worked solutions should be -80x^3 rather than x^2

page 190, exercise 9E, question 1
for part h) the answer in the back has two solutions but the first makes no sense. Angle z (at vertex B) cannot be 61.3 degrees since it is opposite the shortest side AC=4.8 cm and angle A is smaller at 45 degrees.

page 218, exercise 10E, question 2
part e) the equation is in x but the interval is given in θ

page 223, Mixed Exercise 10, question 14
the answer in the back includes 0 and 360 degrees but these are not in the interval given in the question as 0<θ
page 329, example 19
Book uses R = aP^n but then plot log P against log R, meaning gradient wrong. Question should possibly be P = aR^n.

Applied Year 1

Please visit this site about the new version of this book

Check your ISBN:
9781 292 18328 2 is the OLD uncorrected version 1
9781 292 23253 9 is the NEW corrected version 2

There is a PDF listing the changes made, which can be downloaded from here (please let me know if this link doesn't work)

Even the new version does NOT correct the following errors, so I am leaving them here:

page 36 Exercise 2F question 9
This has a rounding error. Standard deviation should be 6.29 not 6.28

page 66 question 3 part a)
on the graph, amend the x axis label to "Number of items (n)"

page 67 question 5 part c)
there is a mismatch between the question and the answer
amend to:
"The equation of the regression line of g on t for the remaining data is g = 44.9 - 0.47t
c) Give an interpretation of the value -0.47 in this regression equation"

page 103 example 4
uses 0.001 when 0.01 meant, and the critical region is completely wrong

page 216 Mixed Exercise 4 question 5 part c)
amend to:
"If the temperature increases by approximately 1 degree C, the number of pairs of gloves sold each month decreases by 0.47."
The Solutionbank answer for this uses the regression line of t on g as given, but has a totally different answer for part c based on 10 gloves predicting a 1.8 degree drop of temperature.

page 223 Exercise 8A question 3 part c)
amend to "k = 10 metres" (not seconds)

page 146 question 11 part b)
amend to "x-coordinate -8" (not -28) to yield the answer in the back

page 227 Exercise 10B question 5 part b) iii
amend the bearing to "036.9"

page 230 Review Exercise 2
question 12 no answers given
part b) should be 2.5ms-2 for the trailer and 2.17ms-2 for the car
question 19 no answers given
part a) should be a = 6 - 3t^1/2  and part b) s = 3t^2 - (4/5)t^5/2

Core Pure Year 1 (for Further Maths)

page 102 Exercise 6B question 4
matrix C should not contain a comma

exercise 6E question 1
the printed answer has 2/5 in the bottom right-hand corner but this should be 2/3

page 121 question 5
equation C should start with the variable x

page 232 Exercise 6A question 12d
the top-right element of the matrix should have the denominator 6 not 16

Pure Year 2

page 73
"Now consider the sum of the geometric series 1 + 1/2 + 1/8 + 1/16 + ..." omits the value of 1/4