This engaging and structured resource (2 sections of scaffolded and varied practice with 10 practice problems) can be used to teach/review writing equivalent ratios using number sense through the context of infection rates (R-Naught ratios) and COVID-19 Variants. The scaffolds are removed in the later sections to promote student independence.

I taught this skill over one day with the following structure:

• Do Now (section 1 #1)
• Guided Notes (rest of section 1)
• Partner / Independent Practice (section 2)

However, there is flexible use! (differentiated stations, homework, small-group reteaches, sub-plans, etc.) If you prefer this resource to be more self-guided, consider pre-filling in examples before administering to students. This resource is great for test prep as well! An answer key is provided.

This resource is condensed version of a full and editable lesson (vocab intro + inquiry instruction + guided notes + key points + discussion prompts + exit ticket + more practice + homework) that can be purchased here!