Counting Blood Cells

Sometimes doctors need to know how many of a certain kind of cell is in a drop of someone’s blood. Here’s something you can do to show you how they find this out.

Subject: Mathematics; Problem Solving
Topics:
- Estimation
- Use Proportional Reasoning
Grades: 3 - 5
Knowledge and Skills:
- Proportional reasoning

Download Activity: Counting Blood Cells (PDF)

Hands-On Math Movie:

The Horse DoctorThe Horse Doctor

A successful professional in any career must be an expert observer, and in no field is this truer than health care. It is especially important to veterinarian Dr. Dina Andrews, whose patients can’t talk.
Running time 1:49 minutes.

Watch the Movie