Activities
S-shaped growth curve - model answers
This page shows suggestions of model answers for the activity on the Population growth curves page. These are model answers not a mark scheme, so of course there are alternative correct answers possible...
Activities
Population growth curves (2025)
This activity shows how populations can grow in limited environments. While it is possible to carry out wet labs or field work to see the growth of populations with this model students can quickly understand...
IB Core
Extended essay - updates for 2027
There are a number of small but significant changes to Extended Essay guidance for EEs submitted for the exam session in May 2027 and onward. This affects students starting their diploma course from September...
IB Core
EE Assessment Criteria from 2018 - 2026
The EE Assessment criteria have changed for candidates taking the exams in 2018 onwards. "Supervisors of extended essays should ensure that the official IB assessment criteria are made available to...
Assessment - introduction
30 investigation ideas for Biology IA Free
This page is a simple list of general biological ideas for investigations. It will be useful for students who are lost for an idea, or teachers who are looking for something to inspire a particular student. ...
Assessment - introduction
IA Investigation 2025 - marking sheets
The following sheets may be useful for marking. This is not an official IB document but they are set out showing the breakdown of the criteria into strands. Each strand should be assessed separately first,...
ATL in Biology
Measuring equipment - model answers Free
1. Describe any variation in your results for volumes of the test tubes Students should say how much variation there is, the range of values, or the maximum and minimum values 2. Suggest why there are...
eBook
C2.1 Chemical signalling - written task
This structured question is in the style of the IB exam questions from paper 2. It covers Higher level material from the guide. The activity includes some information about insulin and about diabetes...
eBook
B3.3 Muscle and motility - written task
This structured question is in the style of the IB exam questions from paper 2. It covers Higher level material from the guide. The activity includes a diagram of a joint in the human body Check your...
eBook
A3.2 Classification & cladistics - written task
This question is in the style of an extended IB exam question from paper 2. It covers Higher level material from the guide. The activity includes information about the morphology of a squid eye and human...