<p>A detailed presentation about atomic structure</p>

<p>Re-Upload from yasith24</p>

<p>Detailed Presentation AND worksheet about Expanding Quadratic equations.</p>

<p>Fantastic presentation/lesson on surds with fun activities! Includes a worksheet.</p>

<p>Presentation on Fraction Equations</p>

<p>The popular free presentation is back showing the essential of Energy Transfer in the Food Chain.</p>

<p>Free revision on Metals and their uses</p>