Most popular

Membrane Structurefree21 May 2017

Students watch a video diagram and have a chance to practise drawing a diagram of plasma membrane structure. Using a range of resources including; a screen cast, flashcards of the labels and their annotations,... more

Evolution introductionfree10 October 2020

After watching a short video introduction to evolution, students answer questions to complete structured notes, about the different types of evidence which support the theory. This is followed by an activity... more

Properties of Water22 August 2021

This lesson uses a screen cast to introduce a simple diagram of hydrogen bonding in water. There are a range of activities to help student to understand how these hydrogen bonds affect the properties... more

Ecological terms.24 September 2019

"Ecology is the study of the distribution and abundance of organisms, the interaction between organisms, the interaction between organisms and their environment, and structure and function of ecosystems."... more

Variation & overproduction5 September 2020

To understand how natural selection leads to evolution it is important to know about variation and overproduction of offspring. These two concepts are the key to understanding evolution. In this activity... more

Leaf stomata & transpiration5 April 2021

What are the special adaptations of leaf structure, and what is the stomata's dilemma? This activity uses a short video introduction to the roles of cells in a leaf and note taking about leaf structure... more

Intro to cladisticsfree7 September 2021

What is a clade? How can we explain analogous and homologous traits using cladograms? What do we need to know about cladograms? All these important questions are covered in this lesson plan using a... more

Classification of Plants23 June 2020

Starting with some self study activities students begin to learn the names and features of the four plant phyla required for IB. Then, using a dichotomous key students search for examples of each phyla... more

Measuring Equipment - IA skills training1 October 2015

This series of short experiments illustrates the skills a student needs to achieve high grades in data processing and the analysis of uncertainties in the IA investigation. These are important new skills... more

Food Webs27 March 2021

A simple introductory food web activity to review trophic levels and feeding relationships students begins this level and then students complete a card sorting activity to consolidate terms such as heterotroph,... more

3 ways to choose a topic for the IA20 September 2020

Many student struggle to choose a topic for their IA investigation This page contains three activities which illustrate how to find an interesting IA topic. The activities look at, research in Science... more

Yoghurt and milk bacteria experiment30 July 2021

This lab is a safe way to demonstrate the structure of prokaryotes and to introduce the variety of roles which prokaryotes have in metabolism. The comparison of slides of milk, yoghurt and kefir illustrates... more

Falsification of membrane structuresfree18 November 2017

The accepted model of membrane structure today is the fluid-mosaic model but this has not always been so. Since 1900 there have been a series of hypothetical structures proposed and tested. The evidence... more

Topic 1 - Cells revision activitiesfree22 May 2019

All the different aspects of the cells topic on a single A3 sheet, for revision. By completing short questions or explanations students are forced to review the whole topic and complete an overview of... more

Further Membrane Structurefree27 August 2017

In this activity students see for themselves the wonderful interactions which occur inside cells and between cells using a short animation from Harvard university. The roles of some membrane proteins... more

Membrane transport modelsfree18 November 2017

Using all that we know about molecules and about the structure of the cell membranes students are challenged to illustrate the transport of four very different molecules through the membrane using play-doh,... more

Condensation & Hydrolysis.9 October 2018

A set of slides helps a teacher led description of how two glucose molecules form a dissacharide by condensation and the same for two amino acids and three fatty acids with glycerol, as in a triglyceride.Students... more

IA - Avoiding common errorsfree21 August 2021

Students are still learning how to complete an IA as they embark on this important piece of work. They gain so many new skills during the process that if it were possible to start again, once they have... more

Ecology mini-investigation11 October 2018

What does an Individual investigation look like? Students will try out all the steps of the planning and carrying out of the individual investigation in the collaborative safety of group work. For each... more

Structure of the digestive system.3 May 2019

With a short screencast students learn a simple method of drawing a diagram of the digestive system. Annotations are added and students can practice their knowledge using some printable flashcards or... more

Intestine Structure & Function.27 June 2019

After learning how to draw an annotated diagram of the digestive system students extend their understanding by looking at details of intestine structure and how they relate to function. This includes... more

Climate Change.free9 October 2018

Two short videos introduce this lesson. David Suzuki gives a simple outline of the process of climate change due to an enhanced greenhouse effect and the second illustrates the complexity of the models... more

A simple unit planner free8 September 2018

Unit plans are an integral part of the MYP and unit plans are featured in the Approaches to Teaching and Learning document (ATL) which the IB has published for the Diploma Programme. There are several... more

Reclassification of figworts using cladisticsfree13 October 2016

In this lesson students first try to make a cladogram using the physical appearance of flowers from the figwort family. This illustrates how classification has been done for many years. In the second... more

Theoretical Genetics 112 March 2021

In this lesson students will be shown the link between chromosomes and genetics. A powerpoint intro to allele and genotypes in a simple case of inheritance of flower colour illustrates the link and demonstrates... more

The Investigationfree29 September 2014

The problem with assessing practical work is that the assessment criteria can restrict the range of tasks which teachers dare to let students do. What may be intended as an assessment of creative, meaningful... more

Blood clotting and heart disease.19 April 2020

Students sequence and explain the events of the chemical cascade which leads to the formation of a blood clot or scab using SOLO hexagons. This is followed by a short activity outlining an important application... more

Meiosis.15 July 2020

The remarkable breeding experiments carried out by Gregor Mendel between 1856 and 1863 are now considered to be the origins of modern genetics. It's easy to overlook the brilliance of Mendel's data analysis... more

Transport in xylem25 January 2020

This lesson follows on from the introductory lesson on vascular tissues and explores the details of the way water travels through plants and how the xylem is adapted to facilitate this transpiration stream.... more

DNA structure - Extras for HL17 January 2020

This lesson introduces students to nucleosomes, and some of the details of DNA structure which will help to understand DNA replication. This includes the purine and pyrimidines bases as well as 5' and... more

Protein Structure.30 September 2020

Knowing the four levels of proteins structure is essential if we are to understand how proteins function in the body. In the first activity students model the different components of protein structure... more

Focusing a research question19 May 2017

One of the most important factors to the success of an Individual investigation is the choice of a relevant and focused research question. What does one of these look like? How can students write one?... more

Controlling Heartbeatfree25 October 2020

How is the pulse rate controlled by the medulla and the adrenal glands? This simple classroom activity is worksheet based with an interactive whiteboard presentation. It will help students to make sense... more

Di-Hybrid Crosses.8 April 2020

This lesson gives students a guided tour of dihybrid genetic crosses using Punnett squares predicting the combination of alleles from two unlinked genes at the same time. The method described provides... more

Chromosomesfree21 January 2018

This lesson begins with a comparison of prokaryote and eukaryote chromosomes and an introduction to the concept of diploid and haploid nuclei. The second activity introduces the use of databases to compare... more

Meristems and Growth.20 December 2019

What is a meristem and how is it that a plant can keep growing for the whole of its life? Micropropagation using the plant meristems as a source of undifferentiated cells has become an important method... more

Alveoli & gas exchange22 May 2019

Students learn about the structure of the lungs and their alveoli including type I and II pneumocytes. After a short quiz on basic lung structure a short screen cast helps students to complete a diagram... more

Ventilation & lung disease29 November 2020

Students begin by looking at the muscle contractions which cause the pressure changes inside the thorax that force air in and out of the lungs to ventilate them. This is followed by an experiment to monitor... more

Karyograms and non-disjunction.10 July 2020

In three short activities student explore how non-disjunction can lead to changes in chromosome number. This is illustrated by reference to Down syndrome (trisomy 21). Students will watch a six minute... more

Gene pools27 January 2020

After consideration of what a gene pool is and the way that evolution causes changes in gene pools this lesson looks at the driving forces of speciation using the examples of Bird of paradise species... more

Endosymbiosis - Nature of Sciencefree9 December 2019

The idea that mitochondria once existed as free living bacteria and that a simple cell engulfed one of these bacterial cells and promptly became a eukaryote cell is a difficult idea to ‘prove’. The... more

Planning pages & Learning activitiesfree6 October 2014

The new IB Biology guide has been written with an emphasis on concept based learning. The IBO wants to encourage teachers to focus on the students' understanding and the development of their skills rather... more

Examples of cladograms (online activity)free7 September 2021

What is a clade? What do we need to know about cladograms? All these important questions are covered in this lesson plan using a variety of materials including short presentations and online resources.... more

Classification gamesfree11 August 2017

Learning the key features of the animal and plant phyla requires some repetition and is not really much fun. So this activity tries to change that. Using a simple set of cards students learn the names... more

Polypeptide structure4 November 2020

Proteins are the second most common molecule after water. In this activity students learn how proteins are formed from amino acids. To explain the formation of a peptide bond it is important to understand... more

Ecology field trip - at home13 April 2020

One component of the IB Biology course which students complete individually is the IA. So it is potentially a good source of activities to do while students are learning from home during the Covid-19... more

Heart Dissection & Diagram12 October 2020

Using a short screen cast students learn a simple method of drawing a diagram of the heart. Annotations are added and students can practice their knowledge using some printable flashcards or a range of... more

DNA Replicationfree17 March 2019

The central dogma of molecular biology, described by Francis Crick, begins with DNA replication. It really is the essence of inheritance and perhaps even the essence of life itself. At SL there are just... more

Immune System 14 November 2020

This lesson contains two constructivist activities. In the first students research and classify microorganisms into pathogens and non pathogens. The second activity is a challenge to narrate a series... more

Calorimetry experiment.7 October 2019

A great simple experiment to illustrate the energy content of these two organic molecules used for energy storage. Students carry out a calorific test on lipids and carbohydrates. They use visualisations... more