Even the most inspiring documents in American history had to go through a few drafts before they were ready for publication. Reinforce the importance of the writing process, as well as the collaborative nature of democracy, with an...

Practice analyzing primary sources in a thought-provoking lesson on the impact of slavery. Young historians read a petition regarding the Fugitive Slave Law and answer a series of questions to understand the importance of the document....

What goes in must come out! Learners play with a function machine to determine the correct function. They enter input values and watch as the machine produces the output.

Caesar ciphers hide secret missives. A simple interactive lets users encode and decode hidden messages. The cipher method here is the Caesar shift.

Open your imagination to make algebra-inspired creations. An interactive lesson has scholars graph images from a set of parameters. Users can practice minimum values, maximum values, and scale as well as key features.