I am having to take my 7th grade to concert/sight reading this year and I need some materials to get them ready. Anyone have any good stuff? I know about Sight Reading factory (My school doesn't have the right technology to be able to use that. Kids don't even have chrome books.)

Any good books I can purchase? I have the 204 progressive sight reading tunes. I need something in unison to start out with and maybe changes to 2 parts? Anything would help!

Thanks!