An engaging 43-slide PowerPoint themed 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 uncover 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.
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: