This unit provides an overview of healthcare trends including evidence based medicine, quality and practice-care recommendations, comparative effectiveness research, and an overview of healthcare reform initiatives in the US.

This unit describes healthcare delivery sites including outpatient care, hospitals, tertiary care centers, academic medical centers, the VA healthcare system, the military health system, the Indian health service, and non-traditional delivery sites such as school-based, community-based, and employer-based sites. It also specifically examines the structure, function and interrelationship between healthcare settings.

Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.

Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.

Using the stethoscope to check blood pressure is a technique thatŐs been used for >100 years! Blood pressure is one of the major vital signs frequently measured by health care workers, and it tells us a lot about our blood circulation. Learn what blood pressure is, how it relates to resistance in a tube, why it is necessary to get oxygen to your cells, and how it can change as you age. WeŐll finally put it all together by relating pressure, flow, and resistance in one awesome equation!

The human body enjoys stability. For example, if your blood pressure changes, the body puts a couple of brilliant systems into motion in order to respond and bring your blood pressure back to normal. There are some quick responses using nerves and some slower responses using hormones. The system using hormones is sometimes called the renin-angiotensin-aldosterone-system (RAAS), which is the main system in the body for controlling blood pressure. When your blood pressure drops too low or gets too high, your kidneys, liver, and pituitary gland (part of your brain) talk to each other to solve the problem. They do this without you even noticing! Learn how the body knows when the blood pressure has changed, and how hormones like angiotensin 2, aldosterone, and ADH help return blood pressure to back to normal.

In this video adapted from the National Science Center, observe a demonstration to discover how helium gas is inert and hydrogen gas is reactive.

This art history video discussion looks at Eva Hesse's "Untitled (Rope Piece)", 1970, rope, latex, string, wire, variable dimensions (Whitney Museum of American Art).

This short video and interactive assessment activity is designed to teach second graders about selecting the correct addition sentence (sums to 100).

This short video and interactive assessment activity is designed to teach first graders about selecting the correct addition sentence (sums to 100).

This site features a video overview of Addition (Sums to Twenty) for 1st Graders.

This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 20).

This short video and interactive assessment activity is designed to teach second graders about subtraction: selecting the correct sentence.

This short video and interactive assessment activity is designed to teach third graders about dividing to find the amount.

This short video and interactive assessment activity is designed to teach fourth graders about division terms.

This short video and interactive assessment activity is designed to give fourth graders an overview of complex weight problems (metric units).

This short video and interactive assessment activity is designed to teach fourth graders about using multiplication replacement to find a new amount.

This short video and interactive assessment activity is designed to teach fourth graders about multiple rounds of multiplication - multiplying 3 digits by 1 digit.

This short video and interactive assessment activity is designed to teach second graders about fluency in subtraction (numbers up to 20).

This short video and interactive assessment activity is designed to teach second graders about selecting the correct subtraction sentence.