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The catapult that shoots the pom-pom the furthest wins the distance challenge. Capture photographs and video of your catapults in action. When all participants/teams have completed the activity, take it in turns to test fire your catapults. Leave the instructions on the table and the area tidy for the next group.If multiple groups are completing the challenge in a carousel, put out a fresh tray of equipment for the next group.Put any spare materials back into the tray, replace the lid.Put your completed catapults aside until you are ready to test them.Take a photograph to evidence your work.When all groups have completed the challenge, you will test your catapults and points will be awarded. Do not take your catapults apart when the buzzer goes.Extra bonus points will also be available for hitting a target (accuracy challenge).The winning catapult will be the one that shoots a pom-pom the furthest (distance challenge).See example catapult pictures for inspiration if needed. You do not have to use all the equipment. Construct two different craft stick catapults using the equipment provided in the tray.Set a timer (optional) for building two catapults, how long is up to you and only necessary if carrying out this activity as a multiple group/participant competitive challenge.Set up a safe target tray for accuracy (see example in picture or design your own) and decide on the points available.Set up a safe test firing range to measure distance (masking tape launch line and a tape measure).Print and laminate (optional) one copy of the activity instructions or view them on any device.Organise all the equipment into the office insert inside a shallow Gratnells (F1) tray and put the lid on.Print, cut out and laminate (optional) one set of the bonus points cards or make your own.The majority of the equipment can be reused afterwards for further STEM challenges. If multiple groups are competing simultaneously or in a carousel, you will need one set of equipment per group. This activity also works for individuals or smaller teams, just increase the amount of time allocated to complete it. The entire catapult could also be constructed from Lego. The equipment list provided details example construction items, however, suitable craft or clean recycled items from the home or classroom could also be used to make catapults, for example, bun cases, drinks cans, small plastic bottles etc. Tip: If working with multiple groups, colour coordinate each group if possible. 4 x Gratnells Art (A1) tray or 1 x Gratnells Art (A1) tray with target circles or bottle caps.1 x Office tray insert to organise all materialsįor the firing range (can be used by all participants):.1 x Shallow Gratnells (F1) tray with lid.Critique and evaluate your own and other people’s designs.Test and modify your design to achieve optimal results.Set distance and accuracy challenges, test and modify your model to get the best results. Use simple equipment or recycled materials to design and build your own catapult. If you would like to find out more about running this activity as part of a carousel, take a look at the CPD Workshops section of the Gratnells Learning Room website where you will find further details and example carousels. It can be carried out as a stand-alone activity for students or combined with other activities from the session to form a STEM carousel. This activity was created as part of a Gratnells What’s in my tray? CPD workshop for primary and secondary science teachers and technicians to support practical work and delivery of the curriculum. Catapults STEM challenge by Amy Collins April 7, 2020