We used a grounded theory approach to investigate and describe the learning of middle school students when they carry out mathematical activities (in the classroom or out of it) and explore mathematical objects and relations using mobile phones. We found that a web of conditions and consequences could be related to the students' learning when they…

This book, stressing safety and prevention of accidents, is designed for children and adults to read together. Each chapter uses a Stop, Think, Act, and Remember (S.T.A.R.) formula to guide children through common situations that require first aid skills. Each first aid topic begins by presenting one or more problem situations that are solved by…