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Aims: We aim to derive the absolute parameters of the components of AD And,AL Cam, and V338 Her, interpret their orbital period changes and discuss theirevolutionary status. Methods: New and complete multi-filter light curves of theeclipsing binaries AD And, AL Cam, and V338 Her were obtained and analysed withmodern methods. Using all reliably observed times of minimum light, we examinedorbital period irregularities using the least squares method. In addition, weacquired new spectroscopic observations during the secondary eclipses for ALCam and V338 Her. Results: For AL Cam and V338 Her, we derive reliable spectraltypes for their primary stars. Statistical checks of orbital period analysisfor all systems are very reassuring in the cases of V338 Her and AD And,although less so for AL Cam. The LIght-Time Effect (LITE) results are checkedby inclusion of a third light option in the photometric analyses. Light curvesolutions provide the means to calculate the absolute parameters of thecomponents of the systems and reliably estimate their present evolutionarystatus. Conclusions: AL Cam and V338 Her are confirmed as classical Algols ofrelatively low mass in similar configurations. Unlike AL Cam, however, V338 Heris still transferring matter between its components, raising interest in thedeterminability of the evolutionary histories of Algols. AD And is found to bea detached system in which both close stars are of age ~109 yr and is probablya "non-classical" young triple, at an interesting stage of its dynamicalevolution.

A fresh insight into the evolutionary status and third body hypothesis of the eclipsing binaries AD Andromedae, AL Camelopardalis, and V338 Herculis