This study concerns a framework for designing Teaching-Learning Sequences that aims to integrate the implementation of scientific practices in the context of daily problems. Said framework consists of three stages (formulation of the design principles, instructional design and design of the learning activities). It is based on four design…

This study analysed the characteristics that children in the initial stages of schooling attribute to living beings. Interviews were conducted with 138 children aged 3-7 years in a school in the Spanish city of A Coruña, Galicia. Aspects found in pen-and-paper activities dealing with living beings, provided by the teachers (158 in total) at this…

This article describes an easy and cheap laboratory exercise for students to discover their own mitochondrial haplogroup. Students use buccal swabs to obtain mucosa cells as noninvasive tissue samples, extract DNA, and with a simple polymerase chain reaction-restriction fragment length polymorphism analysis they can obtain DNA fragments of…

The purpose of this study is to ascertain whether the type of instruction (English as vehicular language and English as a subject) is related to the use of reiteration ties. In the first place, we identified, classified, and counted the number and kind of reiteration ties used by two groups of EFL learners. Secondly, we examined whether…