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Textbooks for Mathematics HL and Mathematics SL

Textbooks for Math HL and Math SL. Two textbooks written by Tim Garry and Ibrahim Wazir that are fully revised 2nd editions providing comprehensive coverage for the new 2014 syllabuses. Each textbook comes with an e-book (accessed through a website) containing a complete digital copy of the text along with numerous additional material.

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I highly recommend any IB Mathematics teacher who is seeking expert guidance on how best to teach either Standard Level or Higher Level Mathematics in today's classroom to subscribe to the InThinking website. It is an invaluable resource for both...

Mike Murray, Dubai American Academy, United Arab Emirates

Tim's InThinking site has been invaluable to me as a new IB teacher. Before starting any new syllabus item, I use the site to gain a better understanding of the types of problems that my students need to be able to solve. It has helped me to format...

Katherine Young, Cologne International School, Germany

Great site. Dense with great ideas and useful printable student material. It has added an extra dimension to my teaching and given me several successful plan B options. Well done Tim.

Peter Morris, Young Business Creatives, Sweden

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400 Problems! PotD

14 November 2019

My growing set of problems for the Problem-of-the-Day section of this site now contains a total of 400 problems (each with a worked solution)... more

new website ... it is coming

30 October 2019

I have put a few notices on this site over the past couple of months indicating that the new website for the new Analysis &... more

Subscriber comments


  • 19 Nov Tim Garry
    equations of lines
    Q.7: (a) A(1,2,1) and B(0,2,2), so AB=(-1,0,1). Goes thru origin (0,0,0), so vector equation is r=(0,0,0) + t(-1,0,1); or just r=t(-1,0,1) same process for parts (b) and (c). Hope this helps. cheers, Tim
  • 19 Nov Tim Garry
    equations of lines
    Q.5: point P is (2,-1,3) and point R is at (6,5,1). So, midpoint of PR is (4,2,2). Vector equation of line is (x,y,z)=(4,2,2) + t(5,-3,1). So, midpoint (4,2,2) is on line; hence, bisector. Direction vector PR is (4,6,-2). Dot product of (5,-3,1)...
  • 19 Nov Tim Garry
    equations of lines
    OK, one at a time. Q.3: gradient of vector in direction (2,-1) is -1/2; so perpendicular gradient is +2. Then equation of line is y-5=2(x-(-3)) which gives 2x-y=-11
  • 18 Nov Jessica Breece
    equations of lines
    Can you show the work for #3 5, and 7 on 1st worksheet please? thanks
  • 18 Nov Notsile Dube
    lines & planes in space (HL)
    Pleasure.
  • 16 Nov Tim Garry
    lines & planes in space (HL)
    Hi Notsile, You are correct. Although it does not affect the answer or the working shown in my solution key - line L (as given in the question) is not parallel to plane P. The direction vector for line L should be (1, 1, - 4), not (3, 1, -...
  • 16 Nov Notsile Dube
    lines & planes in space (HL)
    There is a mistake with Test1 HL question 6. The question is not possible to solve.
  • 16 Nov Fred Iwalwa
    Mock Exams
    Can you send some papers for AASL for practice
  • 16 Nov Beena George
    Teaching Units
    Dear Tim Thanks for your response to my question. Making a realistic and workable unit planner is a challenging task by itself.
  • 14 Nov Tim Garry
    Teaching Units
    Hi Beena, Eventually I'd like to add some materials regarding the construction of unit plans - but I find this a 'tricky' area because there is a wide range of approaches in different schools to writing unit plans. The IB offers some unit plan...
  • 13 Nov Tim Garry
    solving other equations
    Hakan, Thanks for finding this error. The correct answer to Q.8 in EXS_2-7(6) exercise set is approximately 1.29 (your answer). I've corrected the exercise set and uploaded it above (version 2). Thanks, Tim
  • 13 Nov Hakan Kurt
    solving other equations
    Dear Tim, Is the answer of the question 8 x=1.29?I can't get x=1.75. Thanks Hakan