Urine Analysis to identify possible disease and state of hydration

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The grade 11 HL students have been studying the role of the kidney in osmoregulation. In this lesson we discussed the role of antidiretic hormone (ADH) in fine tuning the final volume and concentration of the urine. We also looked at a number of urine samples and tried to match them to potential diseases ( diabetes, kidney damage) and states of hydration. 

Grade 6 Transition Day: Science Taster Activities

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The Grade 6 students visited the Senior School last week to prepare for the transition to grade 7 next year. They all had a sample science lesson where they investigated flame tests, reaction time and candy chromatography. They all enjoyed the experience and are eager to learn more.

We look forward to welcoming the grade 6 students to grade 7 Science next year! SG

Investigating the relationship between changes in ventilation rate after exercise and vital capacity 

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The grade 11 students are working on their next internal assessment. In the first lesson, they measured their ventilation (breathing) rate before and after exercise. In the second lesson, we demoed the use of a spirometer and then blew into balloons and calculated the volume to determine their vital capacity. They will calculate the correlation coefficient of the two factors to determine whether these is a relationship and its strength. This investigation also offers many opportunities to discuss limitations and improvements of the method. 

Learning through dissection

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The grade 9 biologists have been studying the digestive system and this week they dissected frogs to bring this topic to life. The students carefully exposed the frog organs and identified the organs involved in digestion as well as the heart, and lungs. They then cut open the stomach and large intestine to see food at different stages in the digestive process and experienced some smells to help them remember it!

Measuring the rate of photosynthesis using leaf discs

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In  IBDP Biology the students have to be able to plan experiments that measure the rate of photosynthesis.The students cut leaf discs from a plant and transferred them to a syringe filled with water. Once all the air was removed the leaf discs sunk to the bottom of the syringe. As the leaf discs carried out photosynthesis, they produced oxygen that moves into the air spsces surrounding the spongy mesophyll. The leaf discs will then rise as oxygen is produced. By measuring how long it takes for the leaf discs to rise; the rate of photosynthesis can be measured. 

How pregnancy test kits work 

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This week in grade 11 HL we have been studymg the production and applications of monoclonal antibodies. We discussed the use of monoclonal antibodies in new breast cancer treatments and their use in pregnancy test kits. The students can now explain why when only one line develops on the pregnancy test strip this is a negative result and why the development of two lines is a positive sign of pregnancy. SG

 

This youtube video gives a great overview of how herceptin is used to treat some forms of breast cancer.

 

Hip hip hooray for DNA

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The Grade 9 biologists are studying biological molecules. We introduced the study of DNA by listening to the DNA song.

They used colour coded pipe cleaners to model the double helix structure of DNA as well as the complimentary base pairing of adenine with thymine (A with T) and cytosine with guanine (C with G). The students then took photos of their models and described the structure of DNA. 


 

Modelling Muscle Structure and Contraction

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The grade 11 students have been studying muscles and movement this week. They modelled the structure of the sacromere using pipe cleaners and drew diagrams to explain the molecular basis of the sliding filament theory. 

Futurelearn- free online course: Developing your Research Project. Great for Extended Essay students.

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Develop your research skills with this free course from Futurelearn and improve your Extended Essay.

 

 

This is a great free online course focused on developing research and writing skills relevant to the IBDP Extended Essay. I strongly recommend this short course for all grade 11 students as they develop their extended essay research project

I am currently taking the course and have found it very useful for my role as Extended Essay supervisor.

The Futurelearn website also has many other free online courses covering a large range of topics.

The web link is below.

httparn.com/courses/research-project s://www.futurele

Setting and aiming to beat your Personal Best (PB).

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It’s the time of the year for the first end of topic test. In science, students predict how well they think they will perform and then compare this prediction with their actual grade/mark. Research has shown that students can accurately predict their performance. The comparison of predicted and actual grades forms the basis of a post exam learning conversation and reflection on what the student can do to close the gaps in their knowledge.

The first test will also be used to set their personal best (PB) for the rest of the course, students will track and strive to beat their PB.

By reflecting on their learning and always striving to improve, our students are working towards excellence.

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