This is a tried and true unit that I use every year. It gives the students the opportunity to use their computation skills (addition and multiplication) as well as logical reasoning skills. The children love this challenge both mathematically and creatively. Every year the kids tell me it was one of their favorite things we did. It is easy to differentiate this unit, the high kids can solve the problems on their own and kids who struggle can use calculators.
Detailed Unit Plan
Create a Zoo directions
Create a Zoo animal page 1 and 2
Create a Zoo empty map
Graph Paper animal calculations sheet
Final Zoo total
Create a Zoo rubric