Just create two more unit plans integrating science and math content of fractions, decimals, and/or percents. Ensure you have listed each of the science (NSES)) and math (NCTM) standards to include learning goals and objectives.It should be a single unit (3-5 days worth lessons) that includes both math AND science. My recommendation is that it is a science based unit that brings in the math concepts as well. If students gather data, they could then work with that data somehow to meet those math needs.
Be sure to incorporate these two unit plans into the narrative that addresses the assignment criteria, gives specific examples from the two unit plans, and state your rationale.