Club utilise des cookies et des technologies similaires pour faire fonctionner correctement le site web et vous fournir une meilleure expérience de navigation.
Ci-dessous vous pouvez choisir quels cookies vous souhaitez modifier :
Club utilise des cookies et des technologies similaires pour faire fonctionner correctement le site web et vous fournir une meilleure expérience de navigation.
Nous utilisons des cookies dans le but suivant :
Assurer le bon fonctionnement du site web, améliorer la sécurité et prévenir la fraude
Avoir un aperçu de l'utilisation du site web, afin d'améliorer son contenu et ses fonctionnalités
Pouvoir vous montrer les publicités les plus pertinentes sur des plateformes externes
Gestion des cookies
Club utilise des cookies et des technologies similaires pour faire fonctionner correctement le site web et vous fournir une meilleure expérience de navigation.
Ci-dessous vous pouvez choisir quels cookies vous souhaitez modifier :
Cookies techniques et fonctionnels
Ces cookies sont indispensables au bon fonctionnement du site internet et vous permettent par exemple de vous connecter. Vous ne pouvez pas désactiver ces cookies.
Cookies analytiques
Ces cookies collectent des informations anonymes sur l'utilisation de notre site web. De cette façon, nous pouvons mieux adapter le site web aux besoins des utilisateurs.
Cookies marketing
Ces cookies partagent votre comportement sur notre site web avec des parties externes, afin que vous puissiez voir des publicités plus pertinentes de Club sur des plateformes externes.
Une erreur est survenue, veuillez réessayer plus tard.
Il y a trop d’articles dans votre panier
Vous pouvez encoder maximum 250 articles dans votre panier en une fois. Supprimez certains articles de votre panier ou divisez votre commande en plusieurs commandes.
Measuring for the Art Show: Addition on the Open Number Line and Subtractionis one of eight units in the Contexts for Learning Mathematics' Investigating Number Sense, Addition, and Subtraction (K-3) The focus of this unit is the development of the open number line model within the context of measurement. As the unit progresses, the number line is used as a model for double-digit addition strategies. The unit begins with the story of a teacher who has offered to organize an art show of children's work as a school fund-raiser. The children have produced beautiful pieces of art and the teacher and several children set out to make signs to hang underneath each piece, listing the title of the piece, the artist's name, and the price. They want to measure each art piece very carefully so that the sign will be exactly the same length as the piece of art. But this huge pile of work is daunting. Thankfully, the students soon figure out a solution. They sort the art by size, measure each size, and make a blueprint-a pattern strip-that will be used for cutting all the signs. The story sets the context for a series of investigations in this unit. Children measure various sizes of art paper with connecting cubes and then place the measurements onto a long strip of adding machine paper, to be used as a blueprint or pattern for cutting the signs. As the unit progresses, lengths of fives and tens are introduced in place of the cubes and the blueprint is progressively developed into an open number line-a helpful model used as a tool to explore and represent strategies for double-digit addition. In contrast to a number line with counting numbers written below, an "open" number line is just an empty line used to record children's addition (and later subtraction) strategies. Only the numbers children use are recorded and the addition is recorded as leaps or jumps. For example, if a child's strategy for adding 18 ] 79 is to keep 79 whole and decompose the 18 into smaller pieces, moving to a landmark number of 80 (79 + 1 + 10 + 7), it would be recorded on the open number line. Such representations help children move beyond tedious strategies like counting one by one to strategies such as taking leaps of ten, splitting, and using landmark numbers. Several minilessons for addition are also included in the unit. These are structured as strings of related problems designed to guide learners more explicitly toward computational fluency with double-digit addition. The unit culminates with an art show. Thus, as you progress through the unit, you may find it helpful to work with the art teacher in your school to collect pieces of student artwork. To learn more visit http: //www.contextsforlearning.com