Roll-up school chart with a wooden stick at the top and bottom. The top stick has ...

School chart with a thin cord at the top to hang it up. The school chart ...

The school chart depicts a scale and nine images of different types of food.

Roll-up school chart with a wooden stick at the top and bottom. The top stick has ...

Roll-up school chart with a wooden stick at the top and bottom and a thin blue ...

Roll-up school chart with a wooden stick at the top and bottom and a thin blue ...

School chart with a wooden stick at the top and bottom. The top stick has a ...

Roll-up school chart with a wooden stick at the top and bottom. The top stick has ...

A man is led away by six soldiers.

The school chart shows a barricade with dozens of people including one waving a flag. In ...

School chart with holes at the top to hang it up. A black and white drawing ...

Rubens is in the centre in front of a canvas. Next to him are two children. ...

An ammeter can be used to measure electrical current.

A voltmeter can be used to measure electrical voltages.

A voltmeter can be used to measure electrical voltages.

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

Hydrostatic Mohr and Westphal balance. The Mohr balance determines the specific gravity of liquids.

Hydrostatic Mohr and Westphal balance. The Mohr balance determines the specific gravity of liquids.

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...

The weighing scales are in a glass cabinet with a wooden frame and a sliding glass ...