A topic in the Open Knowledge Graph — a free, open map of 15,290 topics and the order to learn them in.
A scaled pictograph uses symbols where each symbol represents multiple items (e.g., each picture = 2 or 5 items). This works for larger quantities better than one-to-one pictographs.
Interpret existing scaled pictographs. Create pictographs with class data using a chosen scale.
Not reading the scale correctly; forgetting to multiply the scale value; drawing incorrect partial symbols.
You already know how to read a pictograph where each symbol stands for exactly one item. A scaled pictograph extends that idea: each symbol now stands for more than one item — maybe 2, maybe 5, maybe 10. The graph itself looks the same, but the key (or legend) tells you the scale, and that changes how you interpret every row.
Suppose a pictograph shows favorite fruits. The key reads "each ★ = 5 students." If the Mango row has 4 stars, that doesn't mean 4 students chose mango — it means 4 × 5 = 20 students chose mango. Every symbol counts as 5, so you multiply the number of symbols by the scale value to get the true count. Reading the key before anything else is the essential first step.
Scaled pictographs exist because a one-to-one graph gets impractical when data is large. Drawing 80 symbols for a category with 80 responses would be tedious. Using a scale of 10 reduces that to just 8 symbols, making the graph clear and compact. The tradeoff is that you need to apply the scale every time you read or build a value.
Half-symbols sometimes appear in scaled graphs to represent half the scale value — for example, a half-star represents 2.5 students when each full star equals 5. When you build your own scaled pictograph, choose a scale that divides evenly into your data values so you can avoid awkward partial symbols. If your data includes 15 and 20 and 35, a scale of 5 works cleanly; a scale of 3 would create messy fractions.