For a collection of online Bingo games try these on MathsStarters.net.
There are many free Bingo resources on TES; note how the search can be narrowed by Key Stage. We could even play Bingo with our older students! some differentiation revision perhaps or Composite Functions? Note that this resource does not require separate Bingo cards, students are asked to select from choices given on the first slide. Some of the TES resources as well as being excellent in their own right provide you with a template for creating your own resources. Try Damian Watson’s Expanding Double Brackets for example – you could easily alter the PowerPoints and the Excel / Word files of Bingo cards. Another set of 10 bingo games comes from Anthony Biggs.
I first came across Mathsbox.org.uk when looking at some resources on TES (TES requires registration but all resources are free). Games of Bingo have been a great success with my students; each time the students have been highly motivated and asked if they could continue playing to try and achieve ‘Full House’. With Year 8 we used Bingo games for practising directed numbers and substitution in algebra; with Year 11 a Bingo game provided a great way to revise completing the square. Mathsbox is now a subscription site (good value in my opinion) but there are free samples to try including a bingo game on solving linear equations.