teaching resource

Addition Detectives PowerPoint

Teach Starter Publishing
PowerPoint | 43 pages | Years: 3

An engaging 43-slide PowerPoint styled as a detective story in which students are tasked with using different addition strategies to uncover suspects.

A bank has been broken into, and a vast sum of money has been stolen. It is up to your students to use their mental addition strategies to reveal the suspects and solve the crime.

This PowerPoint includes seven ‘investigations’, each focusing on a different addition strategy. The investigations include an example of the strategy, a question, an answer and a suspect that is revealed. The story concludes with a final set of questions that reveal the innocent suspects and identify the criminal.

Use this teaching presentation as a consolidation task across multiple lessons to build excitement in the classroom, or solve the crime in one session as a whole-class activity.

This presentation is best paired with the Addition Detectives Unit, which has lessons aligned to each investigation.

Addition strategies include:

  • concrete materials
  • bridging to ten
  • jump strategy
  • number boards
  • split strategy
  • linking addition and subtraction
  • compensation strategy.

To explore addition strategies in greater detail, take a look at the following teaching resources:

Image of Bridging to Ten PowerPoint

teaching resource

Bridging to Ten PowerPoint

A 14-slide PowerPoint that uses engaging animations to step students through the 'bridging to ten' addition strategy.

Teach Starter Publishing14 pagesYears: 2 - 3
Image of Jump Strategy PowerPoint

teaching resource

Jump Strategy PowerPoint

An 11-slide, editable teaching presentation that focuses on the jump strategy.

Teach Starter Publishing11 pagesYears: 2 - 3
Image of Split Strategy PowerPoint

teaching resource

Split Strategy PowerPoint

An 11-slide teaching presentation that focuses on the split strategy.

Teach Starter Publishing11 pagesYears: 2 - 3
Image of Compensation Strategy PowerPoint

teaching resource

Compensation Strategy PowerPoint

A 17-slide teaching presentation that focuses on the compensation addition strategy.

Teach Starter Publishing17 pagesYear: 3


Take a look at the following segment from our Gamified Learning Using Interactive PowerPoints webinar. Resource Producer Tom will step through how to use this PowerPoint with your class.


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  • Janeen

    Hi Julie Thank you so much for your lovely comment! We're so glad your students are enjoying the resource. At this stage we don't have a Subtraction Detectives resource. Please feel free to make this suggestion at our 'Suggest a Resource' page.

  • Sónia Veiga

    Link "Addition detectives unit" does not go to unit at all but generic resources page https://www.teachstarter.com/?go=3557286

  • Gaynor Smith

    I love this! I am a bit confused as there are two Suspect 4's but only one with an identity. Have I missed something??

    • Tom (Teach Starter)

      Hi Gaynor, Great to hear that you are enjoying the Addition Detectives PowerPoint! There should only be one Suspect 4 section. It focuses on using a hundreds chart when adding numbers. I have checked the current download and it is all correct. I'd suggest re-downloading the resource. If you wish, send an email to [email protected] and we will be more than happy to help you figure out what is happening with Suspect 4!

  • Lilian


    • Tom (Teach Starter)

      Hi Lilian, I'm glad you like the Addition Detectives PowerPoint. All the best to you and your students solving the mystery!