« Le Dictionnaire des francophones est un dictionnaire collaboratif numérique ouvert qui a pour objectif de rendre compte de la richesse du français parlé au sein de l’espace francophone ... Les dictionnaires généraux du français se focalisent sur le français standard, commun, par rapport auquel les variétés sociales (argot, mots familiers, etc.) ou géographiques (belgicismes, québécismes, etc.) sont situées. Le but du DDF est de décrire dans une même ressource tous les mots du français, quel que soit la région ou le registre de langue où ils sont utilisés, pour donner accès à une image instantanée, sans cesse renouvelée, du français dans le monde ... Dans le Dictionnaire des francophones, toutes les variétés du français sont présentées ensemble et placées sur un pied d’égalité. »

On peut choisir une localisation géographique avant d'initialiser sa recherche d'un terme quelconque, ou faire une recherche générale qui puisera dans toutes les ressources numériques du DDF.

**À noter que les dictionnaires ne sont pas des ouvrages censurés!**

This is an activity about creating impacts on sandy surfaces. Learners will use trays of sand and a variety of solid objects to model the effects of "impactors" on the surface. This is activity 6 of 9 in Mars and Earth: Science Learning Activities for After School.

Learners will use trays of sand and cups of water to recreate surface features seen in images of Mars. This is activity 5 of 9 in Mars and Earth: Science Learning Activities for After School.

This is an activity about modeling the effect of wind on a sandy surface. Learners will use trays of sand and straws to recreate surface features of images of Mars. Participants test their ideas about how some of the features on Mars might have been produced. This is activity 4 of 9 in Mars and Earth: Science Learning Activities for After School.

This short video and interactive assessment activity is designed to teach second graders about determining time changes in 5-minute intervals.

This short video and interactive assessment activity is designed to teach third graders about solving for beginning time in 5-minute intervals - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about ending time in 5-minute intervals - word problems.

This short video and interactive assessment activity is designed to teach second graders an overview of subtraction (numbers to 1,000).

This short video and interactive assessment activity is designed to teach third graders an overview of subtraction (numbers to 1,000).

This short video and interactive assessment activity is designed to give fourth graders an overview of subtraction (numbers to 1,000).

If your student/child is not sure what they can write, use this handy chart from Scholastic to get them started. There are so many choices!

This 10-minute video lesson provides an introduction to 2nd order, linear, homogeneous differential equations with constant coefficients. [Differential Equations playlist: Lesson 13 of 45]

This 8-minute video lesson continues the discussion from the previous video and shows how to find the general solution. [Differential Equations playlist: Lesson 14 of 45]

This 6-minute video lesson continues the discussion from the previous videos and introduces some initial conditions to solve for the particular solution. [Differential Equations playlist: Lesson 15 of 45]

This 9-minute video lesson continues the discussion from the previous videos and provides another example using initial conditions. [Differential Equations playlist: Lesson 16 of 45]

This 10-minute video lesson looks at what happens when the characteristic equations has complex roots. [Differential Equations playlist: Lesson 17 of 45]

This 10-minute video lesson continues the discussion of what happens when the characteristic equation has complex roots. [Differential Equations playlist: Lesson 18 of 45]

This 10-minute video lesson concludes the series on complex roots of characteristic equations and demonstrates an example with initial conditions. [Differential Equations playlist: Lesson 19 of 45]

This 18-minute video lesson provides an introduction to the Dirac Delta Function. [Differential Equations playlist: Lesson 41 of 45]