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Blog posts

Testing concepts using the H3+ ion 18 October 2021

The trihydrogen cation is one of the most abundant molecular species in the universe. It is also one of the simplest and yet nowhere does it appear on the IB syllabus.Model of the H3+ ion more

“The Strangest Man” 29 July 2021

Teachers in the Northern Hemisphere are hopefully enjoying a summer vacation and recharging their batteries after a stressful Covid-dominated year. For a relaxing and yet very informal and informative... more

Preparing for the May 2021 results 29 June 2021

Next week, on Monday 5th July, the May 2021 IB Diploma results are being released to schools (students will receive their results the next day). As with many other areas of life, education has suffered... more

Thinking through multiple choice questions 10 June 2021

Consider a very simple question, What does two plus two make? The obvious correct answer is four. Most people will arrive at four by simple addition using the equation 2 + 2 = 4 but in fact the answer... more

The dangers of “forever chemicals” to firefighters 5 May 2021

The IB covers halogenoalkanes at both SL and HL in Topic 10 Halogenoalkanes & benzene but restricts the coverage to chloro-, bromo-and iodoalkanes. This is because the C−F bond (492 kJ mol−1) is so... more

Asessement of IB DP Chemistry for May 2021 3 March 2021

There is some confusion on social media about the arrangements the IB have put in place for the May 2021 assessment process as it very much depends upon which country you are based in. I've made some... more

What home schooling is showing 22 February 2021

Good parents will ask their children what they have been doing in school and help them with homework etc. etc. However until now most parents will not have looked in detail at what their children are... more

International-Mindedness in Science 28 December 2020

2020 has been a difficult year for the whole world due to Covid-19. Despite all the sad deaths, economic and educational hardship suffered, one shining example of the human spirit has emerged. Collaboration,... more

Persistent organic pollutants 28 November 2020

The effects of xenobiotics are covered both in Option B Biochemistry & the environment and in Option A Environmental impact - plastics. The presence of persistent organic pollutants (POPs) in the common... more

Update on the implementation of the new programme 9 October 2020

With all the uncertainty and extra pressure on schools, teachers and students caused by the Covid-19 pandemic, which seems likely to continue for some considerable time yet, the IB has announced a delay... more