The study was a quasi-experimental that investigated the effects of Advance Organizers (AO) on achievement in poetry. Target population was class seven pupils of Nakuru North Sub-county primary schools in Kenya. 160 pupils were involved in the study. Four sampled schools were randomly assigned to control and experimental groups in Solomon Four Non-Equivalent Control Design was used to collect data using Pupils Poetry Achievement Test (PPAT) whose Reliability coefficient was 0.76. Prior to the treatment, one control and one experimental group were pretested. The experimental groups were taught using AO. All groups were Post tested. ANOVA was used to analyze data. The results revealed that pupils who were taught using AO demonstrated significant improvement in poetry. The researchers recommend the use AOs in the learning of poetry in English Language.