This chapter investigates the effect of Web-Quest as a medium for teaching grade eight science in two different schools in Jordan. Quasi-experimental research was used with the research participants purposefully sampled from grade eight science students from the living organism science unit as the field of experimentation. The study encompassed an experimental group (N=36) where a Web-Quest instructional model was employed and a control group (N=35) where conventional teaching was used. The data were collected using a critical thinking test and a motivation test. Data were analyzed using descriptive and analytical statistics. The findings show that Web-Quest deployment enhanced critical thinking skills and motivation in comparison to conventional teaching.