Free Science Concept Posters for Secondary Classrooms

OVERVIEW

This poster pack turns some of secondary Science’s trickiest ideas into clear, visual references your students can return to again and again. Spanning forces and motion, cell biology, the pH scale, and chemical reactions, each poster pairs plain-language definitions with a supporting diagram so concepts stick.

Designed for classroom display, the posters give students a quick visual anchor during lessons, revision, and independent work. Whether you are introducing a topic or reinforcing it before an assessment, these references keep the core ideas front and centre.

The set works across multiple year levels and units, so you can display the posters relevant to your current topic and rotate them as your teaching moves through the curriculum.

WHAT THIS POSTER PACK PROVIDES

• Forces in Flight – Introduces weight, lift, drag, and thrust, showing how the four forces act together on an aircraft.
• Aerodynamics – Explains how objects move through the air, with force diagrams for planes and cars plus a comparison of different aircraft designs.
• Mass and Weight – Clarifies the difference between mass and weight and walks through the W = mg equation.
• Mitosis and Meiosis Comparison – Sets the two forms of cell division side by side, from number of divisions through to genetic variation.
• Plant Cells vs Animal Cells – A multi-poster series covering shared organelles, key structural differences, and labelled visuals of the nucleus, membrane, cytoplasm, vacuoles, and mitochondria.
• The pH Scale – Breaks down acidic, neutral, and alkaline substances and explains why the scale is logarithmic, with everyday examples.
• Types of Chemical Reactions – Covers synthesis, decomposition, displacement, and neutralisation reactions, each with a general formula and worked example.