Measuring a Sneeze-
Math 4.1.2.4 ---Solve multi-step real world problems using operations
Math 4.4 --- Collect Data
(Math 2.3.2 --- Measure length inch/cm)
Science 4.IV.G --- Protection from Disease

Measuring the Cell Model-
Math 4.1.2.3 ---Estimate quotients of multi-digit whole numbers
Math 4.1.2.4 ---Solve multi-step real world problems using operations
Math 4.2.2.1-2 ---Use real-world situations involving division to represent number sentences.
Math 4.3.2.3 ---area of 2D figure can be found by tiling
Math 4.4 --- Collect Data
(Math 2.3.2 --- Measure length inch/cm)
Science 4.IV.A --- Cells

Microscopes-
Science 4.IV.A --- Cells
Science 4.IV.G --- Protection from Disease

Bacteria & Food
Math 4.4.1.1 --- Use tables, bar graphs to analyze data

Modeling Bacterial Growth (pre & post)
Math 4.2.1.1 --- Represent patterns and relationships to solve real world problems

m, cm, mm
Math 4.1.1.3 --- Place value, powers of ten
(Math 2.3.2 --- Measure length inch/cm)

Comparing Microscopes
Math 4.2.1.1 --- Represent patterns and relationships to solve real world problems
Math 4.1.3 --- Use grids to represent and compare numbers