Biology is likely not the most popular science subject, especially at Grade 12 level. Grade 12 Biology contains abstract and interconnected concepts, together with a large amount of vocabulary. It is also not the easiest science subject to teach. However, as a teacher-candidate who is devoted to teaching Biology for the rest of my life, I would like to reflect on how learning theories can help a teacher to transform a student, who at first is afraid of Biology, into someone who loves and excels in this subject. In this blog post, I am going to reflect on how constructivism, and growth confidence can be used to encourage Biology students to have a greater confidence and understanding about this subject.
Constructivism: Consolidate from what the Student Already Know
Unlike Physics and Chemistry, the Ontario Curriculum for Biology can be hard to follow – the curriculum merely states that the pre-requisite for Grade 12 Biology is Grade 11 Biology, which basically informs teachers and students nothing. The curriculum design for Chemistry and Physics follows a very clear and obvious step-by-step approach. For example, Strand C Structure and Properties of Matter in Grade 12 Chemistry is very obviously the extension of Strand B Matter, Chemical Trends, and Chemical Bonding in Grade 11 Chemistry. Just by looking at the name, students know that they are going to expand on a strand they have previously learnt from previous grades. The strands in the Biology curriculum isn’t:

The only obvious answer here is strand D, at least both strand names contain the word “genetics”. For other strands, students may feel that they are learning something that is completely new, but that isn’t true at all. If we look into details about the curriculum expectations, we can identify pre-requisite concepts that can be dated back even to grade 9 science, they are just not as obvious. A Biology teacher should make it clear that we are going to re-use concepts that they have already learned to study Grade 12 Biology. According to constructivism, effective teaching should first make students’ existing thinking visible before introducing the scientific explanation. When I am teaching, I always inform my students about two things: “more in grade _” and “from grade _” as a reminder for students. Either I let them know that we stop our learning here and continue in future grades, or I remind the student that this is not something entirely new. Let me focus on “from grade _” as it is a better reminder for students based on Piaget’s psychological constructivism:
1. Assimilation: Students use their existing knowledge to interpret a new or more complex concept. For example, they may initially use their understanding of breathing and oxygen intake to make sense of cellular respiration.
2. Accommodation: Through new evidence, questioning and learning activities, students may recognise the limitations of their original understanding and revise it. For example, they now complete the story of how ATP is an energy carrier by understanding the ATP-ADP cycle, and correct themselves about breathing as a physical process that supports gas exchange, while cellular respiration is a series of biochemical reactions that transfers energy from organic molecules to ATP.
3. Building cognitive equilibrium: Students reflect on what they assimilated and accommodated to find the best cognitive understanding for themselves.
In order to achieve this, I believe the reminder is particularly important in Biology, because this is less obvious than other subjects. The reminder can be delivered in terms of direct information (not ideal but works when instruction time is not enough), a short quiz or even, a self-diagnostic activity.
Growth Confidence: Turning “Failure” into “Learning Evidence”
Grade 12 Biology contains a lot of contents that are high in cognitive load, as cycles or mechanisms often come in more than 6 steps. If we expect students to understand and be able to explain the whole process independently, the task may be out of their zone of proximal development. At least, I can predict that there are some students who won't even start their learning, as they are already lost in where to start, and they remain confused. Their confidence level remains low, which may be strengthened by future low achievements in tests, lab reports, or assignment. To solve this, I believe scaffolding and process-focused feedback are effective ways.
1. Scaffolding: Teachers can break down the learning goals into smaller tasks, each with some levels of scaffolding provided. For example, in cellular respiration, the 6 carbon atoms in glucose can be colour differently. During the 10 steps in glycolysis, the teacher demonstrates the first step in detail, showing where the atoms go and how the reaction proceeds. In each subsequent step, the teacher reduces instruction or visual aid while observing if the students can still follow the process. The teacher keeps monitoring if the student is able to complete the learning independently.
If most of the students demonstrate the ability to process independently, individual or group work can be assigned, for the citric acid cycle and the electron transport chain. In this time, the teacher needs to walk around to continue providing scaffolding for students who still cannot work fully independently.
The main point about scaffolding is it should be temporary. The purpose is to help students to develop ways to learn independently, not to make the work permanently easier. Therefore, I believe observation is the key – when to reduce the level of scaffolding based on the students’ product and achieving the success criteria.
Although scaffolding originates from social constructivism, it can also support growth confidence by allowing students to experience gradual and genuine progress.
2. Process-focused feedback: Teachers should avoid reinforcing a fixed mindset. A teacher should not reinforce one result into a permanent judgment about a student’s ability. Students should remain confident that their understanding can improve and that they can make progress toward the learning goals. Teachers should avoid comments about the personal ability of the students, such as “You have a natural talent in Biology”, or “You are not a Bio person”. Instead, feedback should be focused on the learning process.
Examples vary from different forms of assessment. For tests and presentations, the feedback should focus on the actual misconceptions or achievement from the students, such as “You correctly identify the main stages in glycolysis, but the direction of electron transfer is accidentally reversed. However, you still did a great job on arriving at the correct final product.” For lab reports or scientific investigations, the comments should focus solely on the scientific processes, such as “Your hypothesis did not align with your experimental data. What do you think the problem is? How can you revise the model to explain your experimental data?”. No matter what form of assessment, continuous, constructive and process-focused feedback are great ways to avoid reinforcing their own personal belief on the subject. We should comment on their product rather than their personal characters. We achieve that to help students find out how to improve.
Conclusion
To conclude, constructivism and growth confidence can work together to help students learn Grade 12 Biology. Constructivism reminds us that students are not learning every concept from zero. They already have previous knowledge and experiences that can be used to understand more difficult concepts. Meanwhile, growth confidence helps students believe that even when they do not understand something at first, they can still improve through suitable strategies, feedback and persistence.
As a Biology teacher, my responsibility is not only to deliver the content and help students memorize the vocabularies and biological processes. I should also make connections between their previous and new learning, provide scaffolding when necessary, and gradually allow them to work independently. When students make mistakes, my feedback should help them identify what they have already achieved and what they can do to improve, instead of making a permanent judgment about their ability.
Grade 12 Biology will never become an easy subject, and making it easy should not be the main goal. Instead, I want to make the subject more understandable and approachable, so that students are willing to face its challenges. Hopefully, through these teaching practices, students can gradually change their belief from “I’m not good at Biology” to “I may not understand it yet, but I can learn Biology.”
Calvin C@OTU
References:
Learning key 2: Confidence in our ability to learn to satisfy our needs. (n.d.). [Course reading].
Ontario Ministry of Education. (2008). The Ontario curriculum, grades 11 and 12: Science (Rev. ed.).
https://www.edu.gov.on.ca/eng/curriculum/secondary/2009science11_12.pdf