Food Chain and Food Web
I have used this for my KS3 and KS4, specifically BTEC Biology task P3. Playing a clip of Finding Nemo beforehand has gone down quite well too. This is a slight adaptation of misspiggy82's presentation on Food Chains and Webs (involving Finding Nemo). I have only really taken her presentation and adapted it into smaller concise printouts/worksheets for convenience. Any thanks should go to her on this page http://www.tes.co.uk/teaching-resource/Food-chains-and-Food-webs-3011227/