There are a variety of web-based tools that our school uses to engage students in their learning. I am including that list below. Some of them have "free" subscriptions with limited skills available to entice you to the premium subscription. Check with your school system to see what may be available and if they do not have a subscription, try it for a year with the free version and then make your case for its adoption.
Quizizz
Quizlet
IXL
Magic School AI (AI is awesome to save YOU a ton of time but also great for your students. However - please look at the ISTE.org site to download how you can teach ethical uses of AI to your students FIRST.)
Kahoot
Gimkit
Nearpod

I use Ozobots and they have TONS of activities on their website that make using them easy throughout the school year and in lots of different topics. The lessons are all written by classroom teachers and cover grades K-12.