The rapid expansion of digital media in Lagos, Nigeria has necessitated professional development for teachers to effectively integrate these resources into their classroom practices. A mixed-methods approach was employed, including online surveys and focus groups to gather quantitative data on course engagement and qualitative insights into participant experiences. Teachers reported a significant improvement (p < .05) in their ability to use digital media effectively after participating in the courses. Satisfaction levels were moderate overall with particular enthusiasm for interactive components. The web-based professional development courses successfully enhanced teachers' digital literacy and pedagogical skills, indicating a positive impact on classroom practices. Further research should explore long-term effects of these courses and potential scalability to other regions in Nigeria. Model estimation used $\hat{\theta}=argmin_{\theta}\sum_i\ell(y_i,f_\theta(x_i))+\lambda\lVert\theta\rVert_2^2$, with performance evaluated using out-of-sample error.