OTRNet has now also published the investigations and assessment tasks from Category A: Investigations 1 of the OTRNet Subscription Service. Investigations 2, the investigations and assessment tasks are from Category B.

## Investigations 1This is the printed text version of Category A in the OTRNet Online Subscription Service. This text contains 20 Mathematical Investigations for students from 13 to 15 years of age. Each Investigation comes with an Assessment Task as one possible method of validation of students' learning. The Investigations focus on mathematical processes, otherwise known as Working Mathematically or Reasoning and Strategies. |

## Investigations 2This is the printed text version of Category B in the OTRNet Online Subscription Service. Category B contains 20 Mathematical Investigations for students from 13 to 17 years of age. Each Investigation comes with an Assessment Task as one possible method of validation of students' learning. The Investigations focus on mathematical processes, otherwise known as Working Mathematically or Reasoning and Strategies. |