2.OA.B.2:
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
2-LS4-1
Make observations of plants and animals to compare the diversity of life indifferent habitats
LS4.D; 2-LS4-1
Biodiversity and Humans. There are many different kinds of living things in any area, and they exist in different places on land and in water.