There does not appear to be conversion between unit systems. This is an excellent presentation brought down, slightly, by misguided use of modeling with algebra tiles. It is not clear that anyone need heavy usage of algebra tiles to learn to solve equations, but students who are ready for this coverage definitely do not. The number of algebra-type word problems is a bit thin and the problems invoking the skills mentioned above are mixed in with tables and technology exercises. The properties of inequality are clearly stated with a strong emphasis on the multiplication and division properties with negatives.
More practice is needed in writing equations for word problems.
Not enough examples and practice problems are given. The focus at this level should be on writing and solving equations and inequalities, not on other less efficient methods that one can use even without knowing anything about algebraic methods. This book devotes a whole chapter to linear functions. X and y intercepts, slope, slope intercept form, and parallel lines are all defined. Students are taught to graph inequalities using a solid or dotted boundary line, and then testing points to determine where to shade as the solution area.