Chart assignment
Charts to read and discuss
Read each chart, then answer its questions. Every chart shows its source and date; open it for a table of the numbers and the data to download.
Chart 1 of 2 · NFL
How has your NFL team done each season since 1999?
The interactive chart needs JavaScript. The numbers are on the chart's page.
Choose any NFL team to see its points scored, points allowed and wins each regular season since 1999, next to the NFL average. It opens with the Kansas City Chiefs, who scored 21.3 points a game in the 2025 regular season; their high since 1999 was 35.3, in 2018. Teams that moved include their old cities' seasons (the Raiders' in Oakland, the Chargers' in San Diego, the Rams' in St. Louis), and the Houston Texans start in 2002, their first season. Seasons grew from 16 games to 17 in 2021, so points are per game.
Questions to discuss
- In one sentence of your own, what does this chart show?
- Find the biggest change or difference in the chart. What might explain it?
- Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?
Source: nflverse, NFL schedules and scores (nflverse-data) (CC BY 4.0 (nflverse)) · Data as of Jan 4, 2026
Open the chart and its numbersChart 2 of 2 · World
How fast has the world come online?
The interactive chart needs JavaScript. The numbers are on the chart's page.
73.6% of the world's people used the internet in 2025, up from 15.6% in 2005, the first year the World Bank gives a world figure. It counts people who used the internet at least once in the previous three months. The world figures are estimates by the International Telecommunication Union.
How to read this chart
Each point is the share of the world's people who used the internet at least once in the previous three months, as estimated by the International Telecommunication Union. The axis starts at zero, so the height shows the true share. The steeper the line, the faster people were coming online.
Questions to discuss
- About what share of the world was online in the first year on the chart, and in the latest year?
- Did the share grow faster in some years than others? What could have sped it up?
- Using the internet once in three months counts here. What does this number leave out about how people get online?
Source: World Bank, World Development Indicators: Individuals using the Internet (% of population) (CC BY 4.0 (credit the World Bank)) · Data as of Dec 31, 2025
Open the chart and its numbersTeachers: make your own chart assignment, or change this one. Free, no account needed.