YouCubed has lots of interesting resources, and they also have an entire data science curriculum. You can look at the whole curriculum or explore individual activities.
There are lots of examples of slow reveal graphs on this website. You can scroll through the graphs or search by tag, which can be either the topic, theme, or type of graph. Each graph has a slide deck that walks you through the graph and gives guiding questions.
What’s Going on in this Graph?
Every week, the New York Times publishes an interesting graph without any context. Students are encouraged to analyze the graph and draw conclusions/submit questions and comments on the website. At the end of the week, they share an analysis of the graph and link to the article from which the graph was taken.
RadicalMath empowers educators to address issues of social and racial justice in math classrooms. RM is a hub for curriculum, resources, and professional development opportunities.
This website has some free stuff, though also has more behind a paywall. Their lessons are both real-world (meaningful uses of math) with some focused on social justice issues. One good lesson for Algebra I is Seeking Shelter Homes: What factors impact homelessness in a city?
Skew the Script is a website that is filled with lessons that are centered around real world scenarios. They originally started with the AP Statistics curriculum but now have lessons that cover all of Algebra 1 and Algebra 2.
Google Research Data Sets https://research.google/resources/datasets/
This is a very broad and pretty wild data set, used by educators and professionals. You can find most anything there, but will need to spend some time searching and likely reduce the amount of data from the data set before using it with students.
This is the data website for the CT department of education. They have a lot of information about CT schools in general (check out the diversity dashboard!), along with the individual report cards for each district.
This is another website with a lot of interesting data. They have a lot of their own displays about and you can also look more closely at individual towns/neighborhoods.
American Community Survey data.
These data come from the census. You can work with culled data sets or explore the raw data.
This website has data on CT traffic stops, organized by police department. You can look at the data displays they have created, investigate data tables on their website, or download the entire data set for yourself.
“In the 1930s the federal government created redlining maps for almost every major American city. Mapping Inequality lets you explore these maps and the history of racial and ethnic discrimination in housing policy.” This website includes educational resources likely intended for humanities courses, but contain maps and data that can be applied to mathematics classrooms. In the menu on the left side of the screen, click on the “Teach about Redlining” link to see history focused lessons that include links to maps, graphs and data.