Nearpod a super engaging way of delivering content and collecting formative data from your students. You can create and run this from your teacher computer. Kids can view on any device as well. They have 6500+ ready to run presentations!
See this overview of the main features here:
You can create your own lessons or use already created ones! Here is an image of one that I found for Algebra that teachers slope. There are TONS of free lessons at your disposal. This WEB2oOL is amazing!
They have a free plan! Here is the pricing: