Train-the-Trainer (TTT) methodology uses an expert to train a non-expert on how to implement an intervention and is often used by Cooperative Extension personnel for delivery of programs in the natural setting. In these interventions using multiple educators and/or non-experts, a measure of implementation (fidelity of implementation) is necessary to determine if delivery of the instructional program is as it was designed to be. The objective of this paper is to report the fidelity of implementation (FOI) of iGrow Readers (a literacy-based curriculum that uses children’s books focusing on themes of healthy nutrition and physical activity behaviors) that was delivered by Extension personnel to preschool children in the natural setting of 14 childcare centers through TTT approach. Structural and instructional FOI were assessed by a trained Extension associate. Assessing the FOI of the curriculum delivered by TTT approach provides evidence that the TTT approach is a feasible method of delivery for programing provided by Extension personnel in the natural settings.

The purpose of this research is to develop a worksheet that can support a digital science practicum. Conducting a needs analysis comes first in the development of worksheets, then comes product creation. The product produced based on the needs test analysis is a worksheet with the help of science worksheet-augmented reality (SWAR). Two knowledgeable education professionals then evaluate the finished product and test it out on participants or students. The results of the study show that worksheets equipped with augmented reality media are necessary. Meanwhile, the resulting product is valid in an almost perfect category (Pe = 0.7219; Po = 0.9744; K = 0.9078). Student perceptions of the products produced are at an "excellent" level in each category (ME-Av, mean = 3.466; CO-Av, mean = 3.472; CT-Av, mean = 3.503; ST-Av, mean = 3,507; TA-Av, mean = 3.440; IN-Av, mean = 3.640; MO-Av, mean = 3.640). There is a significant inverse relationship between media features (ME-Av) and student interest (IN-Av) based on Pearson's correlation test with r = -.50 (p < .50). Further explanation is presented based on the data that has been collected.