So far this year in practice we have been working on Equations and Presidents. For (Adventurous) Equations, after the cubes are rolled three Variations are chosen which affect how Goals and Solutions are composed.
These variations are different for Elementary (5th/6th grade) and Middle (7th/8th grade) and the list varies from year to year, so just about everyone on the team has new variations to learn each year.
We have now introduced all the variations (except "Multiple of k" for the Middles) and will be using them in our Friday tournaments right away.
You might want your own copy of the variation sheets, in which case have a look at the Michigan League of Academic Games website where you can find many useful items including the Elementary Variations Sheet and the Middle Variations Sheet.