Lifelong Learning Programme

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TEACHERS EXPERIENCES FORM

Title of the Experience
DNA Structure
Name of the teacher
Katarzyna Karpowicz
Country where it took place
Poland
School typology
Lower Secondary School
Thematic Area
Biology
Experience typology
Teaching in class
Type of contact
Direct
Description of the Experience
Many years of working experience allow me to state that each year students have a problem with the mastery of knowledge about the structure of deoxyribonucleic acid, so after discussing this issue I devote one lesson to the performance by the students of the DNA molecule with plasticine and soft wire. At the beginning of the course we repeat DNA structure. I write all the elements included in the molecule unsubscribed on the board. Then we choose the colors of plasticine for the nitrogenous bases, sugar and phosphoric acid residues, and we determine how we can form hydrogen bonds. After such instruction, students carry out a model of the double helix, during the work I approach each person and I give extra hints if something is still unclear. I appreciate their hard work and commitment. At the end of the lesson young people are preparing an exhibition of their models.
By using the same theoretical knowledge both visual learners and kinesthetic learners very well remember the construction of deoxyribonucleic acid. The measure of the success of the students is that if I ask them to characterize the structure of DNA they list correctly all the components of the molecule.

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