This Special Ten Lock and Key Subtraction Bundle is a GROWING bundle. The Special Ten Lock Strategy projected to be finished and added October 2018.
Currently, it includes the introduction of the Lock and Key via PDL's Lock and Key Subtraction Exploration and PDL's Ten Math facts. This provide students with the basis to be introduced to the Special Ten Lock and Key Subtraction Strategy. The strategy builds students to subtract large numbers without regrouping.
The Special Ten Lock and Key Subtraction strategy is projected to be finished by October 2018. It will include a powerpoint game, a video presentation of the strategy and its progression and worksheets.