We provide a free interactive online textbook for Algebra 1. The interactive lessons use
dynamic graphing and guided discovery to strengthen and connect both symbolic and visual
reasoning. They give the student a hands-on visual introduction to all important Algebra 1
topics, reinforced by standards based adaptive exercises and randomly generated tests. All
exercises and tests are checked and graded automatically.
We recommend our approach for all students, but especially for visual learners or students
who struggle with traditional Algebra 1 textbooks or courses. As in all approaches, the teacher
plays a key role for most students. By removing the need for hand grading and all but the
occasional lecture, we free teachers up to answer questions and help students. We hope to put
the fun back in teaching.
Algebra 1 Lessons, Exercises, and Tests - First Semester
Students should have scratch paper available. Hover the mouse over or tap a link below to see
an example from that lesson (“lab assignment”). Click or tap the link again to go to that
lesson. Please send us your
comments, questions and suggestions.
Grouping in Addition and Subtraction Problems:
Parentheses, associative law of addition, order of operations for addition and
subtraction. Simplifying expressions using the associativity of addition to regroup,
including for subtraction.