1 “... Institute of Technology (Caltech), where he received a Lifetime Achievement Award for Excellence in Teaching...”

2 “..."Best-selling author and leading Rails developer Michael Hartl teaches Rails by guiding you through...”

3 “... teaches Rails by guiding you through the development of three sample applications of increasing...”

4 “... developer Michael Hartl teaches Rails by guiding you through the development of three example applications...”

5 “..."Best-selling author and leading Rails developer Michael Hartl teaches Rails by guiding you through...”

6 “... instructor Michael Hartl teaches the specific concepts, skills, and approaches you need so you can learn...”

7 “... to Be Dangerous, renowned instructor Michael Hartl teaches the specific concepts, skills, and approaches you need...”

8 “.... In Learn Enough Ruby to Be Dangerous, renowned instructor Michael Hartl teaches the concepts, skills...”

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10 “... instructor Michael Hartl teach the specific concepts, skills, and approaches you need to get the job done...”

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