(Also, keep in mind that the Desmos Activity Builder isn’t a tool simply for math.)
Here are the different activities that I’ve created that have been enhanced with collaboration from the fine folks at Desmos.
Partial Number Line Problem – Depending on your learning goals, this 3-Act could fit into an 8th grade, Alg I, Geometry, or Algebra II.
Pencil Sharpener Problem – Linear function problem that has been effective for exploration at the Algebra I and Algebra II Levels. Could be approachable by 8th graders, depending on the learning goals.
Please feel free to use these in your classroom. I look forward to feedback, experiences, anecdotes, and questions.