Students who study algebra are more likely to attend college than those who don't. A major hurdle for students in studying algebra is the transition from arithmetic to algebra. In response to overcoming this hurdle, the College Board and Educational Testing Service has developed "Algebridge," a teaching supplement that integrates assessment and instruction in a student-centered approach, focusing on understanding concepts, not memorizing algorithms. Each unit uses a four-step approach to diagnose and correct student misconceptions. The steps are to "assess" whether a student understands a particular concept by administering the Instructional Assessment, "discuss" with students the given idea while scoring the assessment seeing where misunderstanding lies, "instruct" to clear up conceptual misunderstandings and fill in knowledge gaps using practice sheets and suggested activities and "reassess" using the Follow-up Assessment. The units include: (1) Fractions in Expressions and Equations; (2) Pattern Recognition and Proportional Reasoning; (3) Meaning of Negative Numbers; (4) Constructing Numerical Equations; (5) Attacking Word Problems Successfully; (6) Concept of Variable; (7) Concept of Equality and Inequality; and (8) Operations on Equations and Inequalities. Each unit includes assessment instruments and practice sheets particular to the concepts discussed. The answer key to separate reassessment instruments are included in the answer section of each unit. (MDH)