In conjunction with two noncredit, on-line training modules for the Oregon Master Gardener Program, a team of educators and web designers developed an evaluation tool to help determine the effectiveness of these modules for training Master Gardeners. The evaluation tool includes questions on technical issues, organization and presentation of the module, navigation throughout the module, content and user satisfaction. Data collected from participants via the tool in 1999 on the basic botany module, highlighted areas that needed improvement including reducing the amount of on-screen reading (organization and presentation) and an inability of participants to access video clips and animations (user satisfaction). Overall, participants gave both modules high marks in each of the five categories. Major modifications made to the soils and fertilizers module in 2000 were likely responsible for the improved organization/presentation rating (2.4 in 1999 to 1.9 in 2000 where 1 = highly positive ranking; 5 = highly negative ranking) and the user satisfaction rating (2.5 in 1999 to 2.0 in 2000). Both years the overall acceptability of the course was high 1.45 (1 = highly positive ranking; 5 = highly negative ranking) and 1.80, 1999 and 2000 respectively, and has encouraged the team to continue developing on-line training modules for the Oregon Master Gardener Program.