Stop the germs!

Stop the germs!

Learning about cross contamination of bacteria in schools. Learning about food poisoning bacteria and where and how you can get them.

45 minutes x 2/3

CfE Experiences and Outcomes

  • HWB 2-33a - Having learned about cleanliness, hygiene and safety, I can apply these principles to my everyday routines, understanding their importance to health and wellbeing.

Learning intentions / Success criteria

  • We are learning how cross contamination can happen
  • We are learning how quickly this can happen
  • We are learning how important it is to wash our hands
  • We are learning about the impact that cross contamination can have
  • I can name 3 places where bugs comes from
  • I can explain why I need to wash my hands
  • I can explain how to prevent the spread of bugs


  • Chalk (or glitter or paint)
  • Worksheet 1 Task cards to perform with chalk on hands
  • Worksheet 2 bugs and where you can pick them up
  • Worksheet 3 – drawing a line from bugs to foods where you can pick them up
  • Camera / iPad for filming
  • Teacher resource sheets on food poisoning bacteria
  • School floor plan

Setting up

  • Print out the worksheets
  • Draw or print out a school floor plan


Warm up

  • Chalk on children’s hands (different colours representing different bacteria)
  • Without revealing the topic ask children to perform a number of set tasks on cards on sheet 1

Discuss results of chalk experiment

  • Introduction to bacteria
  • Names and types and where they are found
  • Results of cross contamination and impact on health

School floor plan

  • Show a range of typical places in a school
  • Children need to guess which are likely to have the most / least amount of contamination
  • Discuss results

Develop characters for different bacteria using the sheet 2 worksheet

  • Eg. Sally Salmonella
  • Use characters to create posters or play or iMovie or advertisement or song or news report warning of risks of cross contamination
  • fill in sheet 3 – draw a line from the bug to the correct icons to show where you can get the illness from

Assessment Opportunities

DO – pupils fill in sheet 3 and show an understanding of bugs and which foods you can pick them up from

DO – Self / peer assessment

Photos of drama


  • Identifies ways to reduce the risk of food poisoning, for example, reheating food until piping hot, safe food storage, different coloured chopping boards



  • Children may have sensory issues and not wish to have chalk on hands:
    – Use paper cut outs of hand prints to stick to touch points
    – Provide gloves
  • Use simple information cards for bacteria characters


  • Co-operative learning:
    – Research each bacterium in expert groups
    – Present findings to the class
    – Include the consequences of cross contamination
  • Research global issues re: lack of water and sanitation in parts of the world and the risks of cross contamination
  • Create bacteria Top Trumps
Arrow_Dropdown Created with Sketch. Arrow_leftArrow_Right Icon_AlchoholIcon_Alchohol_RoundalIcon_AppleIcon_Apple_RoundalIcon_BacteriaIcon_Bacteria_Roundal calorie-outlined Created with Sketch. Icon_CardActivityIcon_CardActivity_RoundalIcon_CarrotIcon_Carrot_Roundal Icon/roundal/Allergen/Celery Created with Sketch. Icon_CertificateIcon_Certificate_RoundalIcon_CheeseIcon_Cheese_RoundalIcon_ChocolateIcon_Chocolate_RoundalIcon_ClipboardIcon_Clipboard_Roundal Icon_CloseIcon_CowIcon_Cow_Roundal Shape Created with Sketch. Icon/roundal/Allergen/Crustaceans Created with Sketch. Icon_CursorIcon_Cursor_RoundalIcon_DeerIcon_Deer_RoundalIcon_download Icon/roundal/Allergen/Eggs Created with Sketch. Icon_Facebook_RoundalIcon-FeaturedIcon_Fish Icon/roundal/Allergen/Fish Created with Sketch. Icon_Fish_RoundalIcon_FizzyJuiceIcon_FizzyJuice_RoundalIcon_ForkIcon_Fork_RoundalIcon_FridgeIcon_Fridge_Roundal Icon/roundal/Allergen/Wheat Created with Sketch. Icon_GrainIcon_GrainNoIcon_GrainNo_RoundalIcon_Grain_RoundalIcon_GraphIcon_GraphResourceIcon_Graph_RoundalIcon_HandIcon_Hand_RoundalIcon_HeartIcon_Heart_RoundalIcon_InfoIcon_Info_Roundal instagram Icon_LambIcon_Lamb_RoundalIcon_LetterIcon_Letter_RoundalIcon_LinkExternalIcon_LinkInternal Icon/roundal/Allergen/Lupin Created with Sketch. Icon_MagnifyingGlassIcon_MagnifyingGlass_Roundal Icon/roundal/Allergen/Milk Created with Sketch. Icon/roundal/Allergen/Molluscs Created with Sketch. Icon/roundal/Allergen/Mustrard Created with Sketch. Icon_NewIcon_NewsIcon_News_RoundalIcon_OilIcon_Oil_Roundal Icon/roundal/Allergen/Peanuts Created with Sketch. Icon_PeopleIcon_People_RoundalIcon_PersonIcon_Person_RoundalIcon_PhoneIcon_Phone_RoundalIcon_PigIcon_Pig_RoundalIcon_PlayIcon_PotatoesIcon_Potatoes_RoundalIcon_PrintIcon_Print_RoundalIcon_ResourceIcon_Resource_Roundal Group Created with Sketch. Icon_SaltIcon_Salt_RoundalIcon_SaveIcon_Save_RoundalIcon_ScotlandIcon_Scotland_RoundalIcon_Search Icon/roundal/Allergen/Sesame Seeds Created with Sketch. Icon_ShellfishIcon_Shellfish_Roundal Icon/roundal/Allergen/Soybeans Created with Sketch. Icon-SpiralIcon_SteakIcon_Steak_RoundalIcon_StopwatchIcon_Stopwatch_Roundal Icon/roundal/Allergen/Sulphur dioxide and sulphites Created with Sketch. Icon_TapWaterIcon_TapWater_RoundalIcon_TestTubeIcon_TestTube_RoundalIcon_ThumbsUpIcon_ThumbsUp_RoundalIcon_Tick Shape Created with Sketch. Icon_Tick_1Icon_Tick_Roundal Icon_TomatoIcon_Tomato_RoundalIcon_TractorIcon_Tractor_Roundal Icon/roundal/Allergen/Tree nuts Created with Sketch. Icon_TrollyIcon_Trolly_RoundalIcon_TurkeyIcon_TurkeyCookedIcon_TurkeyCooked_RoundalIcon_Turkey_Roundal Icon_Twitter_RoundalIcon_WarningIcon_Warning_Roundal Icon_Warning_Roundal_WithBG Icon_WaterDropIcon_WaterDrop_RoundalIcon_WineBottleIcon_WineBottle_RoundalIcon_WineGlassIcon_WineGlass_Roundal youtube Icon_snowflakeIcon_snowflake_RoundalLogo_FSS_Gaelic_WhiteLogo_FSS_WhitePagination_LeftArtboard 69