Welcome to ATCG123
THE IB ROADMAP
All units from A1.1 (Water) through D4.3 (Climate Change). IB’s roadmap is designed to progress through the content according to 4 themes: Unity and Diversity (theme A), Form and Function (theme B), Interaction and Interdependence (theme C), and Continuity and Change (theme D).
THE RISS ROADMAP
This is the alternate roadmap we follow at RISS (adapted from BioNinja). This organizes the syllabus according to biology topic – we start with cells and move our way up to more complex living systems, concluding Grade 12 with ecosystems and human impacts.
PACING CALENDER
The calendar we do our best to adhere to throughout the two-year DP program. This is based on the RISS science schedule format: we have 4 SL periods per week, +1 AHL period per week (we often adapt this to 3 SL periods + 2 HL periods).
Example Unit Plan + Slides

Sample Teaching Slides for Topic B3.2: Transport
This is an example of the self-teaching slides that students can use to learn the content for the week. The slides we (teachers) use are a simplified form of these.
Sample Unit Plan for Topic B3.2: Transport
This is an example unit plan for B3.2 that will be shared with students as we approach this unit according to our pacing calendar. Each unit plan includes detailed key objectives + slides for each sub-topic within the syllabus, along with an extensive list of activities for students.
About
ATCG123 was created to support both DP Biology teachers and students as they navigate the rigorous and challenging curriculum.
The site is a compilation of valuable resources, drawing from well-known sources like BioNinja, biologyforlife, and the notes templates from IB Biosone. While the site was originally designed for students, I hope these resources prove useful to fellow IB Bio educators.
I’m Scott Phillips and have been teaching at IB schools for 8 years, and the last couple of years RISS International School.
Feel free to contact me with any questions, comments, concerns – happy studying!
RISS
Rotterdam International Secondary School
Schimmelpenninckstraat 23
3039 KS Rotterdam, Netherlands
sph@wolfert.nl