This online activity includes THREE separate work areas ("Basics", "Explore", and "Negatives") where you can explore how simple algebraic expressions work, and then one game.
In the work areas, you can learn how to add and subtract simple algebraic terms in order to form an expression. For example, you can put together x, xy, another x, and −1 to form 2x + xy −1.
The game is where you are asked to build certain expressions from the "parts" (given terms).
These activities will help students to understand how simple algebraic expressions (polynomials) work: how terms are added, how coefficients work, and how the distributive property is applied. It fits best pre-algebra and algebra 1 courses; however, the "Basics" workarea is usable even for 6th grade math work.
Credit: This activity is created by PhET
Screenshot from the game:
How to combine expresssions: