Apps (the links will give you the web versions of the apps) :
From The Math Learning Center:
Number Frames (Video from Ms Lebel to show you how to use it)
Number Rack (Rekenrek Activities)
Number Pieces (Video from Ms Lebel to show you how to use it)
Number Line (Video from Ms Lebel to show you how to use it)
Geoboard (Video from Ms Lebel to show you how to use it)
Pattern Shapes (Video from Ms Lebel to show you how to use it)
From Mathies, to download only:
Geometry and measurement:
Pixilart (to look at area of their picture)
Usecubes or Blockscad3D: To build 3D cubic shapes (volume of shapes)
Geogebra (to explore geometry, transformations, coordinates): online or download
Others:
To learn your tables: TuxMath Tutorial TuxMath Program
Algebra tiles (also base ten blocks or backgrounds)
Mathigon: the textbook of the future (for algebra tiles) (for activities) (for course library)
Draw.io: to create mindmaps or to create any diagram you need (user manual here)
Coding:
2018 theme for the hour of code: creativity
Code.org (when you are on the page, click on "sign in", use your school email to create your account, click on "hour of code")
Canada Learning Code - Code mobile, request a visit!
CodeMonkey (watch this quick video to see how it works) (Video tutorials for teachers)
10 sites to teach kids how to program
Special activity:
Google celebrating 50 years of kids-coding (click on the triangle to play the activity; you can also create your own google logo by clicking, at the bottom of the page, NEW CS FIRST ACTIVITY!)
Solving problems in math, helpers online:
For teachers :
Visnos; Interactive demonstrations (interactive clock, fraction wall, two clocks, basic angles and protractor, percent/decimal/fraction, ...)
Toy Theater Math Tools like flashcards, interactive clock, thermometer
Didax virtual manipulative (including Snapcubes and free activities)
Matholia: interactive tools like part-part-whole or number line
Virtual Manipulative Math Curious
Interactive Multiplication Table
Mathies.ca : games or learning tools or activities
Beebots activities: from Pinterest
Quelques attitudes gagnantes pour intégrer les TIC en classe
Progression proposée par Sonya Fiset CS Capitale
Mathletics : videos for teachers or teachers' guides
Dreambox: videos for teachers or student overview report or teachers' guides Teachers' tools for class lessons
Seesaw : Getting started with Seesaw video
To teach/learn math differently:
Idea for "Jogging mathématique": mesure du temps
Open Middle: Challenging math problems worth solving, from K to High School
You cubed: Open and Creative Mindset Mathematics