Maths Learning Centre Free Tools - Tens frames, PV blocks, Abacus and more. Online and ipad app options.
EquatIO is a maths tools helper for G Suite. There are free and paid versions. Google Docs integration is free, for Forms, Sheets etc you get a free 30 day trial then it is $100 for a single user. Read these articles to see how you can use it: Top 5 Ways to Use EquatIO in the Classroom
Teachers can set work for learners or groups of learners on most of these sites. Most are game-based high interest sites.
Studyladder NZ site
Prodigy - very game-based and engaging
Sumdog incorporates Khan Academy videos
Mathletics - for schools with subscriptions
e-ako Maths - created to support students who are having difficulty developing a sound knowledge and understanding of place value, fractions, algebra and basic facts.
Real Messy Maths - presentation with lots of maths problems to solve
The Mathematics Shed - heaps of maths problems and activities
Coding can teach many maths concepts and logical thinking. This site has links to many coding and digital technology resources .
Maths Resources for Secondary school
nRich Maths rich maths problems
ABCYa - Variety of interactive maths activities for stages 1 - 8