Teaching Resource

Addition Detectives PowerPoint

PowerPoint | 43 pages|Grade: 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:

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.

 Featured in

Download this resource as part of a larger resource pack or Unit Plan.

      Australian Curriculum alignment

    Teach Starter Publishing
    Published by Teach Starter Publishing
    We create premium quality, downloadable teaching resources for primary/elementary school teachers that make classrooms buzz!

    Comments & Reviews

    Write a review to help other teachers and parents like yourself. If you would like to request a change (Changes & Updates) to this resource, or report an error, simply select the corresponding tab above.

    Log in or sign up to join the conversation.

    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??

    Gaynor Smith · Jul 12th, 2020

    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!

    Tom (Teach Starter) · Jul 13th, 2020



    Lilian · Oct 20th, 2019

    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!

    Tom (Teach Starter) · Oct 21st, 2019

    Suggest a change

    Would you like something changed or customized on this resource? While our team evaluates every suggestion, we can't guarantee that every change will be completed.

    You must be logged in to request a change. Sign up now!

    Report an Error

    You must be logged in to report an error. Sign up now!

    If any of our resources do not have 100% accurate American English (en-US), simply click on the 'Report an error' tab above to let us know. We will have the resource updated and ready for you to download in less than 24 hours. Read more...


    Are you having trouble downloading or viewing this resource? Please try the following steps:

    1. Check that you are logged in to your account
    2. Check that you have a paid subscription
    3. Check that you have installed Adobe Reader (download here)

    If you are still having difficulty, please visit the Teach Starter Help Desk or contact us.

    Contact us

    More time-saving Maths Strategies resources!

    Show more Maths Strategies resources